“implacental”的英文意思

单词

implacental

释义

implacental, a. and n. Zool.|ɪmpləˈsɛntəl|
[f. im-² + placental (f. placenta + -al¹); cf. mod.L. Implacentālia neut. pl., name of the group.]
A. adj. Having no placenta, a term applied to the group of mammals consisting of the marsupials and monotremes (Implacentalia).
1839–47Todd Cycl. Anat. III. 257/1 The quadrupeds..above defined, are..implacental.1865Draper Intell. Devel. Europe xxiii. 562 Mammals, both placental and implacental.
B. n. A mammal that has no placenta; a marsupial or monotreme.
1864in Webster.

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