Webster's Revised Unabridged Dictionary · 1913

Zymosis

Zymosis , noun

[New Latin, from Greek zymwtiko`s fermentation, from zy`mh ferment.]

The medical usage is now (2004) archaic. -- PJC.

(a)
(Medicine) A fermentation; hence, an analogous process by which an infectious disease is believed to be developed.
(b)
(Medicine) A zymotic disease. [Rare]