| MYSID | • mysid n. (Zoology) Any crustacean of the order Mysida. • mysid n. (Zoology, less common) Any crustacean of the family Mysidae. • MYSID n. a kind of small shrimp. |
| RESID | • RESID n. a type of fuel oil. |
| URSID | • ursid n. (Zoology) Any species of the family Ursidae; a bear, a giant panda, or any of certain extinct relatives. • Ursid n. (Astronomy) Any meteor from a radiant in the constellation Ursa Minor. • URSID n. a meteor. |
| CAPSID | • capsid n. The outer protein shell of a virus. • CAPSID n. the outer shell of a virus particle. |
| JASSID | • jassid n. (Zoology) Any leaf-hopper in the family Jassidae, now considered to be the cicadellid subfamily Iassinae. • JASSID n. an insect of the leafhopper family. |
| DIAPSID | • diapsid n. (Zoology) Any of very many reptiles, of the subclass Diapsida, that have a pair of openings in the skull… • DIAPSID adj. of a reptile, having two pairs of temporal openings. • DIAPSID n. a diapsid reptile. |
| LYCOPSID | • lycopsid n. Any primitive plant of the division Lycopodiophyta. • LYCOPSID n. a type of clubmoss. |
| SYNAPSID | • synapsid adj. Pertaining to the class Synapsida, of animals which have an opening low in the skull roof behind each… • synapsid n. Any animal (including all mammals) of the class Synapsida. • SYNAPSID n. one of a group of extinct reptiles. |
| VANESSID | • vanessid n. Any butterfly of the genus Vanessa. • VANESSID n. a butterfly of the red admiral genus Vanessa, also VANESSA. |
| EUPHAUSID | • euphausid n. Synonym of euphausiid. • EUPHAUSID n. one of a genus of shrimplike crustaceans, also EUPHAUSIID. |
| THERAPSID | • therapsid n. Any extinct reptile of the order Therapsida; thought to be direct ancestors of the mammals. • THERAPSID n. one of a group of Permian and Jurassic reptiles considered to be direct ancestors of mammals. |
| CERATOPSID | • ceratopsid n. Any member of the family Ceratopsidae of dinosaurs. • ceratopsid adj. Of or pertaining to these creatures. • CERATOPSID n. a bird-hipped, plant-eating dinosaur of the late Cretaceous. |
| SPHENOPSID | • sphenopsid n. Any horsetail of the former order Sphenopsida, now Equisetopsida. • SPHENOPSID n. any of a class of tracheophyte with jointed ribbed stems. |
| ICHTHYOPSID | • ICHTHYOPSID n. a member of the Ichthyopsida, amphibians, fishes and fishlike vertebrates, also ICHTHYOPSIDAN. |
| NUCLEOCAPSID | • nucleocapsid n. (Biology) The core structure of a virus, consisting of nucleic acid surrounded by a coat of protein. • NUCLEOCAPSID n. the nucleic acid and surrounding protein coat in a virus. |