| 释义 |
metaconid Zool.|mɛtəˈkəʊnɪd|
[f. metacone + -id5.]
A cusp on a mammalian lower molar tooth corresponding to the metacone on an upper molar.
1888H. F. Osborn in Amer. Naturalist XXII. 1073 Only the paracone and metaconids and hypoconids [of Amphitherium] have been observed heretofore. 1904Ann. & Mag. Nat. Hist. XIII. 409 The antero-internal cusp not or scarcely divided into its constituent paraconid and metaconid. 1919[see hypoconid]. 1933A. S. Romer Vertebr. Paleont. xii. 248 The lower teeth tend also to square up..so that the four definitive cusps are the protoconid, metaconid, entoconid, and hypoconid. 1968R. Zangerl tr. Peyer's Compar. Odontol. 186 In the lower jaw..paraconid and metaconid are lingual. 1975Nature 31 July 402/2 Paraconid and metaconid were clearly separated at their bases on the medial face of the tooth. |