The Collaborative International Dictionary
Histozyme
Histozyme \His"to*zyme\, n. [Gr. ? tissue + ? leaven.] (Physiol. Chem.) A soluble enzyme occurring in the animal body, to the presence of which many normal decompositions and synthetical processes are supposed to be due.
Wiktionary
histozyme
n. (context biochemistry dated English) A soluble ferment occurring in the animal body, supposed to be responsible for many normal decompositions and synthetic processes.