| 单词 |
thecodont |
| 释义 |
thecodont, a. and n. Zool.|ˈθiːkədɒnt|
[f. theco- + Gr. ὀδούς, ὀδοντ- tooth.]
a. adj. Of or belonging to the Thecodontes, an extinct order of primitive reptiles having the teeth fixed in sockets in the jaw-bone.
b. n. A reptile having this character.
1840Owen Odontogr. ii. iv. §110. 266 (heading) Thecodonts. Ibid., A third mode of fixation is presented by some extinct Saurians,..the teeth being implanted in sockets..: these may be termed the ‘thecodont’ Lacertians: the most ancient of all Saurians belong to this group. 1876Page Adv. Text-bk. Geol. xv. 282 The thecodont saurians seem peculiar to the Permian. 1877Le Conte Elem. Geol. iii. (1879) 404 In the coal, are also found now some Thecodont (socket-toothed) reptiles, allied to Crocodilians. 1933A. S. Romer Vertebr. Paleontol. viii. 170 An overgrown offshoot from the early thecodont stock was..a large South African Lower Triassic form. Ibid., Confined exclusively to the Triassic, the history of the thecodonts was a brief one. 1980N. Orriss tr. Babin's Elem. Palaeontol. xviii. 327 In the classical conception, birds originated directly from the Triassic thecodonts.
So ˌthecodontoˈsaurian, adj. belonging to or characteristic of the thecodont reptiles; n. a member of this genus.
[1840Owen Odontogr. ii. iv. §112. 267 In the same formation as contained the jaw and teeth of the Thecodontosaurus.] 1869Huxley in Q. Jrnl. Geol. Soc. XXVI. 44 The Thecodontosaurian ilium. Ibid., I shall speak of the bones as those of Thecodontosaurians. |
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