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cetacean

ce·ta·cean

cetacean

 
pronunciation:
s teI shn
features:
Word Combinations (noun), Word Explorer
part of speech: noun
definition: a kind of mammal that lives in the water and has front limbs that look like paddles and back limbs that do not show. Whales, porpoises, and dolphins are all cetaceans.
 
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  mammal