Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun prototherian

1 sense of prototherian

Sense 1
prototherian -- (primitive oviparous mammals found only in Australia and Tasmania and New Guinea)
       => mammal, mammalian -- (any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk)