'Zoa' definitions:
- Zoon \Zo"on\, n.; pl. Zoa. [NL., fr. Gr. zw^,on an animal.]
(Zool.)
(a) An animal which is the sole product of a single egg;
-- opposed to zooid. --H. Spencer.
(b) Any one of the perfectly developed individuals of a
compound animal.
[1913 Webster]
