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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Pol·y·zo·an n. Zool. (a) Any species of Polyzoa; one of the Polyzoa. (b) A polyzoon.
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From: WordNet (r) 2.0

 polyzoan
      n : sessile aquatic animal forming mosslike colonies of small
          polyps each having a curved or circular ridge bearing
          tentacles; attach to stones or seaweed and reproduce by
          budding [syn: bryozoan, sea mat, sea moss, moss
           animal]
      [also: polyzoa (pl)]