| 释义 |
sigmodont, a. and n. Zool.|ˈsɪgmədɒnt|
[f. Gr. σίγµα sigma + ὀδοντ-, ὀδούς tooth.]
a. adj. Belonging to the Sigmodontes, a class of murine animals in which the molars exhibit sigmoid patterns.
b. n. An animal belonging to this class.
1877Coues & Allen N. Amer. Rod. 32 The loops of enamel..do form a sort of sigma, but it is usually a broken and always a distorted one, never more evident than in some other sigmodont forms. 1884Encycl. Brit. XVII. 5/1 A represents the upper molars of a Mus, and B the corresponding teeth of a Sigmodont. Ibid. 6/2 Other groups,..probably descendants of Sigmodont Muridæ. |