*zooid*

n. [ Ascidium + zooid. ] (Zool.) One of the individual members of a compound ascidian. See Ascidioidea. [ 1913 Webster ]

n. [ Gr. da`ktylos finger + E. zooid. ] (Zool.) A kind of zooid of Siphonophora which has an elongated or even vermiform body, with one tentacle, but no mouth. See Siphonophora. [ 1913 Webster ]

n. [ Gr. &unr_; second + E. zooid. ] (Zool.) One of the secondary, and usually sexual, zooids produced by budding or fission from the primary zooids, in animals having alternate generations. In the tapeworms, the joints are deuterozooids. [ 1913 Webster ]

n. [ Gr. &unr_; of double from + E. zooid. ] (Zool.) One of the free-swimming sexual zooids of Siphonophora. [ 1913 Webster ]

n. [ Gr. &unr_; offspring + E. zooid. ] (Zool.) A sexual zooid, or medusoid bud of a hydroid; a gonophore. See Hydroidea, and Illust. of Campanularian. [ 1913 Webster ]

pos>n. (Biol.) A spermatozoid. [ 1913 Webster ]

n. [ Spiral + zooid. So called because they often have a spiral form when contracted. ] (Zool.) One of the special defensive zooids of certain hydroids. They have the form of long, slender tentacles, and bear lasso cells. [ 1913 Webster ]

n. [ Gr. &unr_; third + zw^, on an animal. ] (Zool.) A zooid of the third generation in asexual reproduction. [ 1913 Webster ]

a. [ Zoo- + -oid. ] (Biol.) Pertaining to, or resembling, an animal. [ 1913 Webster ]

n. 1. (Biol.) An organic body or cell having locomotion, as a spermatic cell or spermatozooid. [ 1913 Webster ]

2. (Zool.) (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. [ 1913 Webster ]