noun plural

Im·​plac·​en·​ta·​lia (ˈ)im-ˌplas-ᵊn-ˈtā-lē-ə How to pronounce Implacentalia (audio)
in former classifications
: the monotremes and marsupials regarded as a systematic unit characterized by the absence or rudimentary development of a placenta

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Cite this Entry

“Implacentalia.” Medical Dictionary, Merriam-Webster, Accessed 19 May. 2024.

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