Enzyme \En"zyme\, n. [Pref. en- (Gr. ? in) + Gr. ? 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.

Source: Webster's Revised Unabridged Dictionary (1913)