| ACTINOZOANS | • actinozoans n. Plural of actinozoan. • ACTINOZOAN n. any of a class of marine coelenterates. |
| ANTHOZOANS | • anthozoans n. Plural of anthozoan. • ANTHOZOAN n. any animal of the class Anthozoa of marine coelenterates, which includes sea anemones, corals, and sea-pens. |
| BRYOZOANS | • bryozoans n. Plural of bryozoan. • BRYOZOAN n. a type of small aquatic animal, also POLYZOAN. |
| ECTOZOANS | • ectozoans n. Plural of ectozoan. • ECTOZOAN n. a parasite on the body of an animal, also ECTOZOON. |
| ENTOZOANS | • ENTOZOAN n. an internal parasite, also ENDOZOON, ENTOZOON. |
| EPIZOANS | • epizoans n. Plural of epizoan. • EPIZOAN n. an animal that lives on the surface of another, esp. as a parasite, also EPIZOON. |
| HELIOZOANS | • heliozoans n. Plural of heliozoan. • HELIOZOAN n. a member of the Heliozoa. |
| HYDROZOANS | • hydrozoans n. Plural of hydrozoan. • HYDROZOAN n. any coelenterate of the class Hydrozoa, comprising organisms that are mostly marine and colonial with polyp and medusoid stages in the life cycle, also HYDROZOON. |
| MESOZOANS | • mesozoans n. Plural of mesozoan. • MESOZOAN n. any of a phylum of wormlike organisms. |
| METAZOANS | • metazoans n. Plural of metazoan. • METAZOAN n. any of a major division of multicellular animals, also METAZOON. |
| MYCETOZOANS | • mycetozoans n. Plural of mycetozoan. • MYCETOZOAN n. slime mold. |
| PARAZOANS | • parazoans n. Plural of parazoan. • PARAZOAN n. any of a major division of multicellular animals. |
| POLYZOANS | • polyzoans n. Plural of polyzoan. • POLYZOAN n. a bryozoan, a moss or liverwort. |
| PROTOZOANS | • protozoans n. Plural of protozoan. • PROTOZOAN n. any member of the Protozoa, also PROTOZOON. |
| SCYPHOZOANS | • scyphozoans n. Plural of scyphozoan. • SCYPHOZOAN n. any of a class of medusoid coelenterates; a jelly fish. |
| SPERMATOZOANS | • spermatozoans n. Plural of spermatozoan. • SPERMATOZOAN n. a male sex cell, also SPERMATOZOON. |
| SPOROZOANS | • sporozoans n. Plural of sporozoan. • SPOROZOAN n. any parasitic protozoan of the class Sporozoa, including the causal organisms of malaria and pebrine, also SPOROZOON. |