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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC BY 3.0, For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.

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Accession:CHEBI:37527 term browser browse the term
Definition:An acid is a molecular entity capable of donating a hydron (Bronsted acid) or capable of forming a covalent bond with an electron pair (Lewis acid).
Synonyms:related_synonym: Saeure;   Saeuren;   acide;   acido;   acids
 alt_id: CHEBI:13800;   CHEBI:13801;   CHEBI:22209;   CHEBI:2426
 xref: KEGG:C00174

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  CHEBI ontology 19816
    role 19764
      chemical role 19288
        acid 18293
          Bronsted acid + 18289
          Lewis acid + 1799
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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.