noun plural

Eu·​the·​ria yu̇-ˈthir-ē-ə How to pronounce Eutheria (audio)
: a major division of mammals characterized by the attachment of the developing fetus to the maternal uterus by a placenta and including all mammals living at the present time except the marsupials
eutherian adjective or noun

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Cite this Entry

“Eutheria.” Medical Dictionary, Merriam-Webster, Accessed 1 Oct. 2023.

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