(noun) marine or freshwater animals that form colonies of zooids. Synonyms: Bryozoa, phylum Bryozoa, polyzoa.
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Noun Definition 1
(noun) sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding. Synonyms: bryozoan, polyzoan, sea mat, sea moss, moss animal.