| 释义 |
triconodont, a. Zool.|traɪˈkəʊnədɒnt|
[f. tri- + Gr. κῶνος cone + ὀδοντ- tooth: cf. conodont.]
Having molar teeth with three conical cusps, as the extinct genus Triconodon or family Triconodontidæ of mammals (supposed to be marsupials); also said of such teeth. So triconoˈdontid, an animal of this family; triconoˈdontoid a., belonging to or having the characters of this family; n. = triconodontid; triˈconodonty, the condition of being triconodont.
1881Q. Jrnl. Geog. Soc. XXXVII. 378 The fourth premolar of Triacanthodon approaches the triconodont or true molar type. 1895Funk's Standard Dict., Triconodontid, Triconodontoid. 1897Amer. Nat. Dec. 998 The triconodont crown..was predominant in the Lower Jurassic period. Ibid. 999 Both the ‘haplodont’ and ‘triconodont’ crowns are seen to-day among the Cetacea. 1899Proc. Zool. Soc. 2 May 571 The famous theory of the gradual complication, of triconodonty and trituberculy, is an untenable hypothesis. |