| 释义 |
synapsidenUK
syn·ap·sid S5990650 (sĭ-năp′sĭd)n. Any of a group of amniote vertebrates that first emerged in the late Permian Period, characterized by a single opening in the temporal region on each side of the skull and including the mammals along with various extinct groups more closely related to mammals than to other amniotes.
[New Latin Synapsida, taxon name : syn- + Greek hapsis, hapsid-, arch (from the former belief that the single temporal opening on each side of the synapsid skull evolved by the fusion of the two temporal openings on each side of the diapsid skull ); see apsis.]
syn·ap′sid adj.synapsid (sɪˈnæpsɪd) palaeontoln (Palaeontology) a fossil reptile (of the subclass Synapsida) that exhibits some mammal-like characteristics of the skulladj (Palaeontology) relating to fossil reptiles of the subclass SynapsidaThesaurus| Noun | 1. | synapsid - extinct reptile having a single pair of lateral temporal openings in the skullsynapsid reptilereptile, reptilian - any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct formsprotomammal, therapsid - probably warm-blooded; considered direct ancestor of mammalsictodosaur - intermediate in form between the therapsids and most primitive true mammalspelycosaur - large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North Americaedaphosaurus - heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoicdimetrodon - carnivorous dinosaur of the Permian in North America having a crest or dorsal sail |
EncyclopediaSeeSynapsidasynapsidenUK
Synonyms for synapsidnoun extinct reptile having a single pair of lateral temporal openings in the skullSynonymsRelated Words- reptile
- reptilian
- protomammal
- therapsid
- ictodosaur
- pelycosaur
- edaphosaurus
- dimetrodon
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