any animal that gives birth to live young, not eggs, and feeds its young on milk. Cows, humans and whales are all mammals. 哺乳动物 deaths among marine mammals 海洋哺乳动物的死亡
Oxford Collocations Dictionaryadjective- large
- small
- higher
- …
- species
- population
- among mammals
Word Originearly 19th cent.: anglicized form (first used in the plural) of modern Latin mammalia, neuter plural of Latin mammalis (adjective), from mamma ‘breast’.