bryozoan

Definitions of bryozoan
  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: moss animal, polyzoan, sea mat, sea moss
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    type of:
    invertebrate
    any animal lacking a backbone or notochord; the term is not used as a scientific classification
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