noun, plural zoa [zoh-uh] . Biology Rare.
any of the individuals of a compound organism.
any individual, or the individuals collectively, produced from a single egg.

1860–65; < Neo-Latin zōon < Greek zôion animal

zoonal [zoh-uh-nl] , adjective
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World English Dictionary
zoon (ˈzəʊɒn)
n , pl zoa, zoons
a less common term for zooid
[C19: from New Latin, from Greek zōion animal; related to Greek zōē life]

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American Heritage
Medical Dictionary

-zoon suff.
Animal; independently moving organic unit: spermatozoon.

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