| ZOA | • zoa n. Plural of zoon. • zoa n. Plural of zoön. • ZOON n. the whole product of one fertilized egg. |
| EPIZOA | • epizoa n. Plural of epizoon. • EPIZOON n. an animal that lives on the surface of another, esp. as a parasite, also EPIZOAN. |
| ECTOZOA | • ectozoa n. Plural of ectozoon. • ECTOZOON n. a parasite on the body of an animal, also ECTOZOAN. |
| ENDOZOA | • ENDOZOON n. an internal parasite, also ENTOZOAN, ENTOZOON. |
| ENTOZOA | • entozoa n. Plural of entozoon. • ENTOZOON n. an internal parasite, also ENDOZOON, ENTOZOAN. |
| METAZOA | • metazoa n. (Zoology) The multicellular eukaryotes of the kingdom Metazoa considered collectively. • Metazoa prop.n. A taxonomic kingdom within the domain Eukarya – the metazoa. • METAZOON n. any of a major division of multicellular animals, also METAZOAN. |
| PARAZOA | • Parazoa prop.n. (Archaic) A taxonomic subkingdom within the kingdom Animalia – the sponges. • PARAZOON n. any member of the Parazoa, sponges, also PARAZOAN. |
| POLYZOA | • polyzoa n. Plural of polyzoon. • Polyzoa prop.n. (Obsolete) Synonym of Bryozoa. • POLYZOON n. one of the individual zooids forming the compound organism of a polyzoan. |
| DIPLOZOA | • DIPLOZOON n. a parasitic flatworm that fuses in pairs. |
| HYDROZOA | • hydrozoa n. A large group of marine animals, of the class Hydrozoa, whose life cycles contain a sexual and asexual stage. • Hydrozoa prop.n. A taxonomic class within the phylum Cnidaria – hydrozoas. • HYDROZOON 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 HYDROZOAN. |
| PROTOZOA | • protozoa n. Plural of protozoan. • protozoa n. Plural of protozoon. • Protozoa prop.n. Protozoans; eukaryotes that are primarily unicellular, existing singly or aggregating into colonies… |
| SPOROZOA | • Sporozoa prop.n. The sporozoans. • SPOROZOON n. a parasitic one-celled animal. |
| HEMATOZOA | • hematozoa n. Plural of hematozoon. • HEMATOZOON n. a protozoan that is parasitic in the blood, also HAEMATOZOON. |
| HAEMATOZOA | • haematozoa n. Plural of haematozoon. • haematozoa n. Plural of haematozoan. • hæmatozoa n. Plural of hæmatozoon. |
| SPERMATOZOA | • spermatozoa n. Plural of spermatozoon. • SPERMATOZOON n. a male sexual cell, which fertilises the egg, also SPERMATOZOAN. |