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English definition of “cetacean”

cetacean

noun [C] uk   /sɪˈteɪ.ʃən/ specialized us  
any of various types of mammal, such as the whale, that live in the sea like fishMarine mammals
cetacean
adjective uk   us  
Plants and animals - general words
(Definition of cetacean from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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