| MYSIDS | • mysids n. Plural of mysid. • MYSID n. a kind of small shrimp. |
| RESIDS | • RESID n. a type of fuel oil. |
| URSIDS | • ursids n. Plural of ursid. • Ursids n. Plural of Ursid. • URSID n. a meteor. |
| CAPSIDS | • capsids n. Plural of capsid. • CAPSID n. the outer shell of a virus particle. |
| JASSIDS | • jassids n. Plural of jassid. • JASSID n. an insect of the leafhopper family. |
| DIAPSIDS | • diapsids n. Plural of diapsid. • DIAPSID n. a diapsid reptile. |
| LYCOPSIDS | • lycopsids n. Plural of lycopsid. • LYCOPSID n. a type of clubmoss. |
| SYNAPSIDS | • synapsids n. Plural of synapsid. • SYNAPSID n. one of a group of extinct reptiles. |
| VANESSIDS | • vanessids n. Plural of vanessid. • VANESSID n. a butterfly of the red admiral genus Vanessa, also VANESSA. |
| EUPHAUSIDS | • euphausids n. Plural of euphausid. • EUPHAUSID n. one of a genus of shrimplike crustaceans, also EUPHAUSIID. |
| THERAPSIDS | • therapsids n. Plural of therapsid. • THERAPSID n. one of a group of Permian and Jurassic reptiles considered to be direct ancestors of mammals. |
| CERATOPSIDS | • ceratopsids n. Plural of ceratopsid. • CERATOPSID n. a bird-hipped, plant-eating dinosaur of the late Cretaceous. |
| SPHENOPSIDS | • sphenopsids n. Plural of sphenopsid. • SPHENOPSID n. any of a class of tracheophyte with jointed ribbed stems. |
| ICHTHYOPSIDS | • ICHTHYOPSID n. a member of the Ichthyopsida, amphibians, fishes and fishlike vertebrates, also ICHTHYOPSIDAN. |
| NUCLEOCAPSIDS | • nucleocapsids n. Plural of nucleocapsid. • NUCLEOCAPSID n. the nucleic acid and surrounding protein coat in a virus. |