\Zo"oid\, a. [Zo["o]- + -oid.] (Biol.)
Pertaining to, or resembling, an animal.

\Zo"oid\, n.
1. (Biol.) An organic body or cell having locomotion, as a
   spermatic cell or spermatozooid.
2. (Zo["o]l.)
   (a) An animal in one of its inferior stages of
       development, as one of the intermediate forms in
       alternate generation.
   (b) 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.