Pyrotheria

plural noun

Py·​ro·​the·​ria

ˌpīrōˈthirēə

: an order of Paenungulata or in some classifications a suborder of Ungulata comprising large South American ungulates of Lower Tertiary age that have incisors like tusks and the cheek teeth all much alike and having two parallel transverse ridges

Word History

Etymology

New Latin, pyr- + -theria

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