| Noun | 1. | polyzoa - marine or freshwater animals that form colonies of zooidsanimal kingdom, Animalia, kingdom Animalia - taxonomic kingdom comprising all living or extinct animals bryozoan, moss animal, polyzoan, sea mat, sea moss - 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 Ectoprocta, phylum Ectoprocta - coextensive with or a subphylum of Bryozoa phylum - (biology) the major taxonomic group of animals and plants; contains classes |