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notoungulate Definition

noto·ungu·late (nōt′ō uŋ′gyo̵̅o̅ lit, -lāt′)

noun

any of an extinct order (Notoungulata) of plant-eating mammals, once widespread in South America
also notungulate notun′·gu·late (nō tuŋ′-)

Etymology: < ModL Notoungulata: see noto- & ungulate