Zō'oid, n.

n. [Gr. ζῶον, an animal, and εἶδος, form.] (Nat. Hist.) (a.) An organic cell having locomotion like a true animal, as a spermatic cell, or spermatozoid. (b.) An animal in one of its inferior stages of development. (c.) One of the individual animals in a composite group, as of zoöphytes or bryozoa. Dana. Carpenter.