View your list of saved words. (You can log in using Facebook.)
Definition of BRYOZOAN
: any of a phylum (Bryozoa) of aquatic mostly marine invertebrate animals that reproduce by budding and usually form permanently attached branched or mossy colonies
Origin of BRYOZOAN
New Latin Bryozoa, from Greek bryon + New Latin -zoa
First Known Use: circa 1864
Aquatic invertebrate of the phylum Bryozoa (moss animals), members (called zooids) of which form colonies. Each zooid is a complete and fully organized animal. Species range in size from a one-zooid colony small enough (less than 0.04 in., or 1 mm, long) to live between sand particles to colonies that hang in clumps or chains as much as a 1.6 ft (0.5 m) across. The texture of colonies varies from soft and gelatinous to hard with calcium-containing skeletons. Freshwater bryozoans attach primarily to leaves, stems, and tree roots in shallow water. Marine bryozoans have a wide range of habitats, from coastal areas to great ocean depths, but are most common just below the tidemarks. Bryozoans feed by capturing plankton with their tentacles.