Cetacea :: Cetacea (n. pl.) An order of marine mammals, including the whales. Like ordinary mammals they breathe by means of lungs, and bring forth living young which they suckle for some time. The anterior limbs are changed to paddles; the tail flukes are horizontal. There are two living suborders:.

Cetacean :: Cetacean (n.) One of the Cetacea.

Cetaceous :: Cetaceous (a.) Of or pertaining to the Cetacea.

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