Prototheria

plural noun

Pro·​to·​the·​ria
: a subclass of Mammalia that is coextensive with Monotremata or in some classifications includes both Monotremata and Allotheria and that is represented in the recent fauna solely by the egg-laying platypus and echidnas

Word History

Etymology

New Latin, from prot- + -theria

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Cite this Entry

“Prototheria.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Prototheria. Accessed 8 Nov. 2024.

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