implacentate

implacental

[im-pluh-sen-tl]
adjective
1.
Zoology. having no placenta, as a monotreme or marsupial.
noun
2.
an implacental mammal.
Also, implacentate [im-pluh-sen-teyt] .


Origin:
1830–40; im-2 + placental

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World English Dictionary
implacental (ˌɪmpləˈsɛntəl)
 
adj
another word for aplacental

Collins English Dictionary - Complete & Unabridged 10th Edition
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