Clues for the word "ZOOID"

We've had 4 crossword clues used for this word, and seen it 3 times in crosswords. It was last seen in New York Times crossword on January 28, 2010.

Definition of zooid

a. - Pertaining to, or resembling, an animal.
n. - An organic body or cell having locomotion, as a spermatic cell or spermatozooid.
n. - An animal in one of its inferior stages of development, as one of the intermediate forms in alternate generation.
n. - One of the individual animals in a composite group, as of Anthozoa, Hydroidea, and Bryozoa; -- sometimes restricted to those individuals in which the mouth and digestive organs are not developed.