- C1 e. subunit of the first component of complement (C1) involved in the activation of the classical pathway.
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es·ter·ase 'es-tə-.rās, -.rāz n an enzyme that accelerates the hydrolysis or synthesis of esters
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n.
an enzyme that catalyses the hydrolysis of esters into their constituent acids and alcohols. For example, fatty-acid esters are broken down to form fatty acids plus alcohol.
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es·ter·ase (esґtər-ās) 1. a term used in the recommended and trivial names of the hydrolases that act on ester bonds [EC 3.1] to produce an alcohol and an acid. 2. a general term used for any enzyme catalyzing this reaction.Medical dictionary. 2011.