implacental

American  

[im-pluh-sen-tl] / ˌɪm pləˈsɛn tl /

Also implacentate

adjective

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

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noun

1. an implacental mammal.

implacental British  

/ ˌɪmpləˈsɛntəl /

adjective

1. another word for aplacental

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Etymology

Origin of implacental

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

Chances against concordant variations.—Examples of discordant ones.—Concordant variations not unlikely on a non-Darwinian evolutionary hypothesis.—Placental and implacental mammals.—Birds and reptiles.—Independent origins of similar sense organs.—The ear.—The eye.—Other coincidences.—Causes besides Natural Selection produce concordant variations in certain geographical regions.—Causes besides Natural Selection produce concordant variations in certain zoological and botanical groups.—There are homologous parts not genetically related.—Harmony in respect of the organic and inorganic worlds.—Summary and conclusion ...

From Project Gutenberg