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Unified Medical Language System® (UMLS®)

2008AB MeSH Source Information


Relationship Relationship Attribute Count (MRREL.RRF)
SIB * 383144
RB mapped_from 250554
SY permuted_term_of 86042
RB * 81513
PAR * 33894
SY entry_version_of 16470
RO * 11478
RB inverse_isa 10480
RO * 10392
SY sort_version_of 3959
RO entry_combination_of 697
SIB * 200
PAR * 138
SY has_expanded_form 83
PAR * 19
PAR * 3

  • * Indicates blank relationship attribute (rela); not all relationships are assigned an attribute.
  • Orange colored rel/rela pairs indicate that the current row is an inverse relationship of the row above it. All relationships in MRREL.RRF are bi-directional.
  • Metathesaurus relationships are traditionally read from right to left.
  • Every row in MRREL.RRF has a RUI (relationship unique identifier).
  • Samples below are taken from MRREL.RRF, although not every field is shown. Associated terms (str) from MRCONSO.RRF are also shown for clarity.
  • Relationship abbreviations appear in MRREL, i.e., SY.

  • AQ: allowed qualifier
  • CHD: has child (narrower hierarchical term)
  • DEL: deleted concept
  • PAR: has parent (broader hierarchical term)
  • QB: can be qualifier by
  • RB: has a broader relationship
  • RL: has similar or like relationship
  • RN: has narrower relationship
  • RO: has relationship other than synonymous, narrower or broader
  • RQ: related and possibly synonymous
  • SIB: has sibling
  • SY: source-asserted synonymy

SIB  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C0004309 A0027877 SDUI Auditory Perception SIB C0036674 A0115373 SDUI Sensory Deprivation
C0036674 A0115373 SDUI Sensory Deprivation SIB C0004309 A0027877 SDUI Auditory Perception
C0020616 A0071254 SDUI Hypoglycemic Agents SIB C0021054 A0135448 SDUI Immunologic Factors
C0021054 A0135448 SDUI Immunologic Factors SIB C0020616 A0071254 SDUI Hypoglycemic Agents
C0323627 A1171206 SDUI Acaridae SIB C1004038 A2207822 SDUI Tetranychidae
C1004038 A2207822 SDUI Tetranychidae SIB C0323627 A1171206 SDUI Acaridae
C0043318 A0134459 SDUI Xanthines SIB C0089267 A0138757 SDUI 1-Deoxynojirimycin
C0089267 A0138757 SDUI 1-Deoxynojirimycin SIB C0043318 A0134459 SDUI Xanthines
C0021684 A0074624 SDUI Insurance, Health, Reimbursement SIB C0085563 A0104677 SDUI Prepaid Health Plans
C0085563 A0104677 SDUI Prepaid Health Plans SIB C0021684 A0074624 SDUI Insurance, Health, Reimbursement
RB  (return to top)
cui1 aui1 stype1 str rel rela cui2 aui2 stype2 str
C0056359 A0174626 SDUI Corti-Dynexan RB mapped_from C0032483 A0103170 SDUI Polyethylene Glycols
C0032483 A0103170 SDUI Polyethylene Glycols RN mapped_to C0056359 A0174626 SDUI Corti-Dynexan
C0613305 A1317674 SDUI platinum(II) dibromo-1,2-diaminocyclohexane RB mapped_from C0029255 A0095309 SDUI Organoplatinum Compounds
C0029255 A0095309 SDUI Organoplatinum Compounds RN mapped_to C0613305 A1317674 SDUI platinum(II) dibromo-1,2-diaminocyclohexane
C1120470 A2331886 SDUI xanthohypericoside RB mapped_from C0017765 A0063849 SDUI Glucosides
C0017765 A0063849 SDUI Glucosides RN mapped_to C1120470 A2331886 SDUI xanthohypericoside
C1435876 A6811157 SDUI 3,4-methylenedeoxy-2,8,9-trimethoxypavinan RB mapped_from C1257875 A2786347 SDUI Benzylisoquinolines
C1257875 A2786347 SDUI Benzylisoquinolines RN mapped_to C1435876 A6811157 SDUI 3,4-methylenedeoxy-2,8,9-trimethoxypavinan
C1450206 A6970909 SDUI Kcnk15 protein, rat RB mapped_from C0949654 A2039235 SDUI Potassium Channels, Tandem Pore Domain
C0949654 A2039235 SDUI Potassium Channels, Tandem Pore Domain RN mapped_to C1450206 A6970909 SDUI Kcnk15 protein, rat
SY  (return to top)
cui1 aui1 stype1 str rel rela cui2 aui2 stype2 str
C2350543 A15587429 AUI Metabolism Concepts SY permuted_term_of C2350543 A15585471 AUI Concepts, Metabolism
C2350543 A15585471 AUI Concepts, Metabolism SY has_permuted_term C2350543 A15587429 AUI Metabolism Concepts
C0056373 A0363524 AUI Corticotropin Releasing-Hormone Receptors SY permuted_term_of C0056373 A0174657 AUI Corticotropin Releasing Hormone Receptors
C0056373 A0174657 AUI Corticotropin Releasing Hormone Receptors SY has_permuted_term C0056373 A0363524 AUI Corticotropin Releasing-Hormone Receptors
C0006112 A1645229 AUI Encephalopathies, Metabolic SY permuted_term_of C0006112 A1645230 AUI Encephalopathy, Metabolic
C0006112 A1645230 AUI Encephalopathy, Metabolic SY has_permuted_term C0006112 A1645229 AUI Encephalopathies, Metabolic
C1720857 A10904386 AUI Adipocytes, Brown SY permuted_term_of C1720857 A10905080 AUI Brown Adipocyte
C1720857 A10905080 AUI Brown Adipocyte SY has_permuted_term C1720857 A10904386 AUI Adipocytes, Brown
C0319116 A10909651 AUI Parvovirus H-1 SY permuted_term_of C0319116 A10906852 AUI H-1, Parvovirus
C0319116 A10906852 AUI H-1, Parvovirus SY has_permuted_term C0319116 A10909651 AUI Parvovirus H-1
RB  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C2354156 A15582542 SCUI AC-262536 RB C2354157 A15590455 SCUI 4-(3-hydroxy-8-aza-bicyclo(3.2.1)octyl)naphthalene-1-carbonitrile
C2354157 A15590455 SCUI 4-(3-hydroxy-8-aza-bicyclo(3.2.1)octyl)naphthalene-1-carbonitrile RN C2354156 A15582542 SCUI AC-262536
C0078437 A0238348 SCUI W 7 RB C0130379 A7773041 SCUI N-(6-aminohexyl)-5-chloro-1-naphthalenesulfonamide
C0130379 A7773041 SCUI N-(6-aminohexyl)-5-chloro-1-naphthalenesulfonamide RN C0078437 A0238348 SCUI W 7
C0065391 A0201178 SCUI lysophosphatidylinositol RB C1130432 A7772272 SCUI lysophosphatidylinositols
C1130432 A7772272 SCUI lysophosphatidylinositols RN C0065391 A0201178 SCUI lysophosphatidylinositol
C0245390 A0476677 SCUI contraction-inhibiting peptide (Mytilus) RB C0245389 A7781871 SCUI MIPs
C0245389 A7781871 SCUI MIPs RN C0245390 A0476677 SCUI contraction-inhibiting peptide (Mytilus)
C0218280 A0377445 SCUI ICI D2788 RB C0218279 A7780484 SCUI 4-(N-ethyl-N-phenylamino)-1,2-dimethyl-6-(methylamino)pyrimidinium chloride
C0218279 A7780484 SCUI 4-(N-ethyl-N-phenylamino)-1,2-dimethyl-6-(methylamino)pyrimidinium chloride RN C0218280 A0377445 SCUI ICI D2788
PAR  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C0071598 A6975852 SDUI Polyketide Synthases PAR C0026741 A0088496 SDUI Multienzyme Complexes
C0026741 A0088496 SDUI Multienzyme Complexes CHD C0071598 A6975852 SDUI Polyketide Synthases
C0035143 A0111101 SDUI Repression PAR C0011142 A0045795 SDUI Defense Mechanisms
C0011142 A0045795 SDUI Defense Mechanisms CHD C0035143 A0111101 SDUI Repression
C0025284 A0084694 SDUI Meningeal Neoplasms PAR C0085136 A0036750 SDUI Central Nervous System Neoplasms
C0085136 A0036750 SDUI Central Nervous System Neoplasms CHD C0025284 A0084694 SDUI Meningeal Neoplasms
C0039757 A0124862 SDUI Thenoyltrifluoroacetone PAR C0006480 A0033447 SDUI Butanones
C0006480 A0033447 SDUI Butanones CHD C0039757 A0124862 SDUI Thenoyltrifluoroacetone
C0299212 A10909933 SDUI Presenilin-1 PAR C0872078 A10909935 SDUI Presenilins
C0872078 A10909935 SDUI Presenilins CHD C0299212 A10909933 SDUI Presenilin-1
SY  (return to top)
cui1 aui1 stype1 str rel rela cui2 aui2 stype2 str
C0035649 A1069238 AUI Reportings, Hospital Risk SY entry_version_of C0035649 A12094631 AUI REPORTINGS HOSP RISK
C0035649 A12094631 AUI REPORTINGS HOSP RISK SY has_entry_version C0035649 A1069238 AUI Reportings, Hospital Risk
C0011351 A0053913 AUI Enamel Hypoplasia, Dental SY entry_version_of C0011351 A12079280 AUI ENAMEL HYPOPLASIA DENT
C0011351 A12079280 AUI ENAMEL HYPOPLASIA DENT SY has_entry_version C0011351 A0053913 AUI Enamel Hypoplasia, Dental
C0034960 A0067683 AUI Hereditary Type IV Motor and Sensory Neuropathy SY entry_version_of C0034960 A12080135 AUI HEREDITARY TYPE IV MOTOR SENSORY NEUROPATHY
C0034960 A12080135 AUI HEREDITARY TYPE IV MOTOR SENSORY NEUROPATHY SY has_entry_version C0034960 A0067683 AUI Hereditary Type IV Motor and Sensory Neuropathy
C0019958 A0069223 AUI Hospital Bed Capacity, under 100 SY entry_version_of C0019958 A12090469 AUI HOSP BED CAPAC UNDER 100
C0019958 A12090469 AUI HOSP BED CAPAC UNDER 100 SY has_entry_version C0019958 A0069223 AUI Hospital Bed Capacity, under 100
C0034084 A0107802 AUI Pulmonary Subvalvular Stenoses SY entry_version_of C0034084 A12068977 AUI PULM SUBVALV STENOSES
C0034084 A12068977 AUI PULM SUBVALV STENOSES SY has_entry_version C0034084 A0107802 AUI Pulmonary Subvalvular Stenoses
RO  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C0019472 A0068018 SCUI Hexokinase RO C0019473 A7759477 SCUI Hexokinase A
C0019473 A7759477 SCUI Hexokinase A RO C0019472 A0068018 SCUI Hexokinase
C0020524 A1643662 SCUI Disorders of Excessive Somnolence RO C0751229 A7798398 SCUI Hypersomnolence
C0751229 A7798398 SCUI Hypersomnolence RO C0020524 A1643662 SCUI Disorders of Excessive Somnolence
C0062697 A0192696 SCUI HH 232 RO C0109051 A7768669 SCUI Cephatac
C0109051 A7768669 SCUI Cephatac RO C0062697 A0192696 SCUI HH 232
C0062890 A2401251 SCUI Hlya protein, E coli RO C1429295 A7831750 SCUI ehxA protein, E coli
C1429295 A7831750 SCUI ehxA protein, E coli RO C0062890 A2401251 SCUI Hlya protein, E coli
C1702076 A10004699 SCUI p-fluoro-L-deprenyl RO C1701581 A10004697 SCUI p-fluoro-D-deprenyl
C1701581 A10004697 SCUI p-fluoro-D-deprenyl RO C1702076 A10004699 SCUI p-fluoro-L-deprenyl
RB  (return to top)
cui1 aui1 stype1 str rel rela cui2 aui2 stype2 str
C0058772 A0181681 SDUI DSP 4 RB inverse_isa C0039052 A0121865 SDUI Sympathomimetics
C0039052 A0121865 SDUI Sympathomimetics RN isa C0058772 A0181681 SDUI DSP 4
C0071130 A0218047 SDUI pirenperone RB inverse_isa C0040614 A0127421 SDUI Tranquilizing Agents
C0040614 A0127421 SDUI Tranquilizing Agents RN isa C0071130 A0218047 SDUI pirenperone
C0071625 A0219225 SDUI polymyxin B nonapeptide RB inverse_isa C0162713 A0292069 SDUI Photosensitizing Agents
C0162713 A0292069 SDUI Photosensitizing Agents RN isa C0071625 A0219225 SDUI polymyxin B nonapeptide
C0044720 A0139987 SDUI 11-(dansylamino)undecanoic acid RB inverse_isa C0016320 A0059975 SDUI Fluorescent Dyes
C0016320 A0059975 SDUI Fluorescent Dyes RN isa C0044720 A0139987 SDUI 11-(dansylamino)undecanoic acid
C0010467 A0044158 SDUI Curcumin RB inverse_isa C0003392 A0025200 SDUI Antineoplastic Agents
C0003392 A0025200 SDUI Antineoplastic Agents RN isa C0010467 A0044158 SDUI Curcumin
RO  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C0031708 A0101066 SDUI Phosphorus Radioisotopes RO C0031705 A0101053 SDUI Phosphorus
C0031705 A0101053 SDUI Phosphorus RO C0031708 A0101066 SDUI Phosphorus Radioisotopes
C0600502 A12992710 SDUI Hemostatic Disorders RO C0019087 A1366101 SDUI Hemorrhagic Disorders
C0019087 A1366101 SDUI Hemorrhagic Disorders RO C0600502 A12992710 SDUI Hemostatic Disorders
C0005469 A12990343 SDUI Biobibliography RO C0005358 A12990273 SDUI Bibliography
C0005358 A12990273 SDUI Bibliography RO C0005469 A12990343 SDUI Biobibliography
C0600666 A12997476 SDUI Pictorial Works RO C0376653 A12987941 SDUI Book Illustrations
C0376653 A12987941 SDUI Book Illustrations RO C0600666 A12997476 SDUI Pictorial Works
C0221793 A10909374 SDUI Opiate Alkaloids RO C0029112 A0094958 SDUI Opium
C0029112 A0094958 SDUI Opium RO C0221793 A10909374 SDUI Opiate Alkaloids
SY  (return to top)
cui1 aui1 stype1 str rel rela cui2 aui2 stype2 str
C0012875 A0050800 AUI DNA Modification Methylases (Cytosine-Specific) SY sort_version_of C0012875 A12073019 AUI DNA MODIFICATION METHYLASES CYTOSINE SPECIFIC
C0012875 A12073019 AUI DNA MODIFICATION METHYLASES CYTOSINE SPECIFIC SY has_sort_version C0012875 A0050800 AUI DNA Modification Methylases (Cytosine-Specific)
C0054950 A6980375 AUI Tumor Necrosis Factor Receptor Superfamily, Member 8 SY sort_version_of C0054950 A12073423 AUI TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 08
C0054950 A12073423 AUI TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 08 SY has_sort_version C0054950 A6980375 AUI Tumor Necrosis Factor Receptor Superfamily, Member 8
C0001021 A0017143 AUI 3-Ketothiolase SY sort_version_of C0001021 A12075302 AUI KETOTHIOLASE 3
C0001021 A12075302 AUI KETOTHIOLASE 3 SY has_sort_version C0001021 A0017143 AUI 3-Ketothiolase
C0162540 A0291071 AUI Phage P22 SY sort_version_of C0162540 A12076944 AUI PHAGE P 022
C0162540 A12076944 AUI PHAGE P 022 SY has_sort_version C0162540 A0291071 AUI Phage P22
C0676150 A12985854 AUI CXCL11 Chemokine SY sort_version_of C0676150 A12990574 AUI CXCL 011 CHEMOKINE
C0676150 A12990574 AUI CXCL 011 CHEMOKINE SY has_sort_version C0676150 A12985854 AUI CXCL11 Chemokine
RO  (return to top)
cui1 aui1 stype1 str rel rela cui2 aui2 stype2 str
C0002658 A0023075 SDUI Amphetamine RO entry_combination_of C0002667 A0023082 SDUI Amphetamines
C0002667 A0023082 SDUI Amphetamines RO has_entry_combination C0002658 A0023075 SDUI Amphetamine
C0006290 A0032937 SDUI Bronchoscopy RO entry_combination_of C0179432 A0320999 SDUI Bronchoscopes
C0179432 A0320999 SDUI Bronchoscopes RO has_entry_combination C0006290 A0032937 SDUI Bronchoscopy
C0015462 A0057607 SDUI Facial Nerve RO entry_combination_of C0161408 A1646105 SDUI Facial Nerve Injuries
C0161408 A1646105 SDUI Facial Nerve Injuries RO has_entry_combination C0015462 A0057607 SDUI Facial Nerve
C0018956 A0066833 SDUI Hematopoietic Stem Cells RO entry_combination_of C0242603 A0420538 SDUI Hematopoietic Stem Cell Transplantation
C0242603 A0420538 SDUI Hematopoietic Stem Cell Transplantation RO has_entry_combination C0018956 A0066833 SDUI Hematopoietic Stem Cells
C0030234 A0767577 SDUI Palmitic Acid RO entry_combination_of C0030235 A0096968 SDUI Palmitic Acids
C0030235 A0096968 SDUI Palmitic Acids RO has_entry_combination C0030234 A0767577 SDUI Palmitic Acid
SIB  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C0003186 A0135348 CODE Anthropology, Education, Sociology and Social Phenomena (MeSH Category) SIB C0007995 A0135374 CODE Chemicals and Drugs (MeSH Category)
C0007995 A0135374 CODE Chemicals and Drugs (MeSH Category) SIB C0003186 A0135348 CODE Anthropology, Education, Sociology and Social Phenomena (MeSH Category)
C0079023 A0135357 CODE Biological Sciences (MeSH Category) SIB C0021424 A0723397 CODE Information Science (MeSH Category)
C0021424 A0723397 CODE Information Science (MeSH Category) SIB C0079023 A0135357 CODE Biological Sciences (MeSH Category)
C0018689 A0135434 CODE Health Care (MeSH Category) SIB C1256749 A0135482 CODE Psychiatry and Psychology (MeSH Category)
C1256749 A0135482 CODE Psychiatry and Psychology (MeSH Category) SIB C0018689 A0135434 CODE Health Care (MeSH Category)
C0020158 A0135443 CODE Humanities (MeSH Category) SIB C0080022 A12071572 CODE Natural Sciences (MeSH Category)
C0080022 A12071572 CODE Natural Sciences (MeSH Category) SIB C0020158 A0135443 CODE Humanities (MeSH Category)
C0021424 A0723397 CODE Information Science (MeSH Category) SIB C1256748 A0135472 CODE Organisms (MeSH Category)
C1256748 A0135472 CODE Organisms (MeSH Category) SIB C0021424 A0723397 CODE Information Science (MeSH Category)
PAR  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C0015397 A0057461 SDUI Eye Diseases PAR C0012674 A0135391 CODE Diseases (MeSH Category)
C0012674 A0135391 CODE Diseases (MeSH Category) CHD C0015397 A0057461 SDUI Eye Diseases
C0018749 A0066248 SDUI Health Services Administration PAR C0018689 A0135434 CODE Health Care (MeSH Category)
C0018689 A0135434 CODE Health Care (MeSH Category) CHD C0018749 A0066248 SDUI Health Services Administration
C0027612 A2030181 SDUI Congenital, Hereditary, and Neonatal Diseases and Abnormalities PAR C0012674 A0135391 CODE Diseases (MeSH Category)
C0012674 A0135391 CODE Diseases (MeSH Category) CHD C0027612 A2030181 SDUI Congenital, Hereditary, and Neonatal Diseases and Abnormalities
C0039798 A3879771 SDUI therapy PAR C1256740 A2367948 CODE MeSH Qualifiers
C1256740 A2367948 CODE MeSH Qualifiers CHD C0039798 A3879771 SDUI therapy
C0079107 A3879714 SDUI chemistry PAR C1256740 A2367948 CODE MeSH Qualifiers
C1256740 A2367948 CODE MeSH Qualifiers CHD C0079107 A3879714 SDUI chemistry
SY  (return to top)
cui1 aui1 stype1 str rel rela cui2 aui2 stype2 str
C1524024 A3879705 AUI analysis SY has_expanded_form C1524024 A12096030 AUI AN
C1524024 A12096030 AUI AN SY expanded_form_of C1524024 A3879705 AUI analysis
C0034526 A3879759 AUI radiation effects SY has_expanded_form C0034526 A12070489 AUI RE
C0034526 A12070489 AUI RE SY expanded_form_of C0034526 A3879759 AUI radiation effects
C0005839 A3879710 AUI blood supply SY has_expanded_form C0005839 A12088678 AUI BS
C0005839 A12088678 AUI BS SY expanded_form_of C0005839 A3879710 AUI blood supply
C0015127 A3879732 AUI etiology SY has_expanded_form C0015127 A12088685 AUI ET
C0015127 A12088685 AUI ET SY expanded_form_of C0015127 A3879732 AUI etiology
C0025953 A3879745 AUI microbiology SY has_expanded_form C0025953 A12070484 AUI MI
C0025953 A12070484 AUI MI SY expanded_form_of C0025953 A3879745 AUI microbiology
PAR  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C0012674 A0135391 CODE Diseases (MeSH Category) PAR C1256741 A2366890 CODE Index Medicus Descriptor
C1256741 A2366890 CODE Index Medicus Descriptor CHD C0012674 A0135391 CODE Diseases (MeSH Category)
C0018689 A0135434 CODE Health Care (MeSH Category) PAR C1256741 A2366890 CODE Index Medicus Descriptor
C1256741 A2366890 CODE Index Medicus Descriptor CHD C0018689 A0135434 CODE Health Care (MeSH Category)
C0021424 A0723397 CODE Information Science (MeSH Category) PAR C1256741 A2366890 CODE Index Medicus Descriptor
C1256741 A2366890 CODE Index Medicus Descriptor CHD C0021424 A0723397 CODE Information Science (MeSH Category)
C1256748 A0135472 CODE Organisms (MeSH Category) PAR C1256741 A2366890 CODE Index Medicus Descriptor
C1256741 A2366890 CODE Index Medicus Descriptor CHD C1256748 A0135472 CODE Organisms (MeSH Category)
C1256741 A2366890 CODE Index Medicus Descriptor PAR C1256739 A2367943 CODE MeSH Descriptors
C1256739 A2367943 CODE MeSH Descriptors CHD C1256741 A2366890 CODE Index Medicus Descriptor
PAR  (return to top)
cui1 aui1 stype1 str rel cui2 aui2 stype2 str
C1135586 A2367949 CODE MeSH Supplementals PAR C1135584 A0434168 AUI MeSH
C1135584 A0434168 AUI MeSH CHD C1135586 A2367949 CODE MeSH Supplementals
C1256739 A2367943 CODE MeSH Descriptors PAR C1135584 A0434168 AUI MeSH
C1135584 A0434168 AUI MeSH CHD C1256739 A2367943 CODE MeSH Descriptors
C1256740 A2367948 CODE MeSH Qualifiers PAR C1135584 A0434168 AUI MeSH
C1135584 A0434168 AUI MeSH CHD C1256740 A2367948 CODE MeSH Qualifiers