Webster’s Revised Unabridged Dictionary · 1913
Enzyme
En′zyme (ĕn′zīm), n. [Pref. en- (Gr. ἐν in) + Gr. ζύμη leaven.] (Physiol. Chem.) An unorganized or unformed ferment, in distinction from an organized or living ferment; a soluble, or chemical, ferment. Ptyalin, pepsin, diastase, and rennet are good examples of enzymes.