coelurosaur(redirected from Coelurosauria)
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Any of various theropod dinosaurs of the diverse group Coelurosauria of the Jurassic and Cretaceous Periods, having a stiff tail, hingelike ankle, usually long forelimbs, and sometimes featherlike structures, and including oviraptor and T. rex.
[From New Latin Coelūrosauria, group name : Greek koilos, hollow; see keuə- in Indo-European roots + Greek ourā, tail; see ors- in Indo-European roots + Greek sauros, lizard.]
coe·lur′o·saur′i·an adj. & n.
(Palaeontology) any of various small to very large bipedal carnivorous saurischian dinosaurs belonging to the suborder Theropoda, active in the Triassic and Cretaceous periods; Tyrannosaurus was a coelurosaur, and birds are thought to have evolved from small coelurosaurs
[C20: from New Latin, from Greek koilos hollow + ouros tail + -saur]