implacentaladj.n.

/ɪmpləˈsɛntəl/

Etymology: < im- prefix² + placental adj. and n. ( < placenta n. + -al suffix¹); compare modern Latin Implacentālia neuter plural, name of the group.

Zoology.

A. adj.

Having no placenta, a term applied to the group of mammals consisting of the marsupials and monotremes (Implacentalia).

ΘΚΠ

the world > animals > mammals > group Implacenta > [adjective] > having no placenta

implacental1839

1839–47 Todd's Cycl. Anat. & Physiol. III. 257/1 The quadrupeds..above defined, are..implacental.

1865 J. W. Draper Intell. Devel. Europe xxiii. 562 Mammals, both placental and implacental.

B. n.

A mammal that has no placenta; a marsupial or monotreme.

ΚΠ

1864 in Webster's Amer. Dict. Eng. Lang.

This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2022).

单词	implacental
释义	implacentaladj.n. /ɪmpləˈsɛntəl/ Etymology: < im- prefix² + placental adj. and n. ( < placenta n. + -al suffix¹); compare modern Latin Implacentālia neuter plural, name of the group. Zoology. A. adj. Having no placenta, a term applied to the group of mammals consisting of the marsupials and monotremes (Implacentalia). ΘΚΠ the world > animals > mammals > group Implacenta > [adjective] > having no placenta implacental1839 1839–47 Todd's Cycl. Anat. & Physiol. III. 257/1 The quadrupeds..above defined, are..implacental. 1865 J. W. Draper Intell. Devel. Europe xxiii. 562 Mammals, both placental and implacental. B. n. A mammal that has no placenta; a marsupial or monotreme. ΚΠ 1864 in Webster's Amer. Dict. Eng. Lang. This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2022). < adj.n.1839
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