"mammalian" in the noun sense
1. 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
"mammalian" in the adjective sense
1. mammalian
of or relating to the class Mammalia
Source: WordNet® (An amazing lexical database of English)
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