| mammal | (noun) 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 | Synonyms: mammalian |
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| mammalian | (noun) 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 | Synonyms: mammal |
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| mammalogist | (noun) one skilled in the study of mammals | - |
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| mammalogy | (noun) the branch of zoology that studies mammals | - |
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| paleomammalogy | (noun) the paleobiology of ancient mammals | - |
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| protomammal | (noun) probably warm-blooded; considered direct ancestor of mammals | Synonyms: therapsid |
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