zymogen

• POS: Noun
• HYPHEN: zy=mo=gen

CIDE DICTIONARY

zymogen, n. [Zyme + -gen.].

 A mother substance, or antecedent, of an enzyme or chemical ferment; -- applied to such substances as, not being themselves actual ferments, may by internal changes give rise to a ferment.  [1913 Webster]
"The pancreas contains but little ready-made ferment, though there is present in it a body, zymogen, which gives birth to the ferment."  [1913 Webster]