implacental

[ im-pluh-sen-tl ]

adjective

1. Zoology. having no placenta, as a monotreme or marsupial.

noun

1. an implacental mammal.

implacental

/ ˌɪmpləˈsɛntəl /

adjective

1. another word for aplacental

Word History and Origins

Origin of implacental¹

First recorded in 1830–40; im- ² + placental ( def )

Example Sentences

Implacental, im-pla-sen′tal, adj. having no placenta, as certain marsupial animals.

From Project Gutenberg

Didelphia, dī-del′fi-a, n.pl. the marsupialia, or marsupial implacental mammals, one of the three sub-classes of Mammalia.—adjs.

From Project Gutenberg

On land, all the indigenous mammals, except bats, belong to the lowest, or implacental division; and the insects are singularly different from those found elsewhere.

From Project Gutenberg

Again, the implacental mammals, including the Ornithodelphia and the Marsupials, are admitted to be lower than the placental series.

From Project Gutenberg

A similarly increasing ratio should be granted for the successive developments of the difference between the Lemuroid and the higher forms of primates; for those between the original primate and other root-forms of placental mammals; for those between primary placental and implacental mammals, and perhaps also for the divergence of the most ancient stock of these and of the monotremes, for in all these cases modifications of structure appear to increase in complexity in at least that ratio.

From Project Gutenberg