Also found in: Medical.
Animal; independently moving organic unit: spermatozoon.
n combining form
(Biology) indicating an individual animal or an independently moving entity derived from an animal: spermatozoon.
[from Greek zōion animal]
a combining form meaning “animal,” “organism” of the kind specified by the initial element, often corresponding to zoological taxa ending in -zoa, with -zoon used to name a single member of such a class: protozoon.
[< New Latin zōon < Greek zôion animal]