ce·ta·cean 
(sĭ-tāshən)
(sĭ-tāshən)n.
Any of various marine mammals of the order Cetacea, including the whales, dolphins, and porpoises, having the general shape of a fish with forelimbs modified to form flippers, a tail with horizontal flukes, and one or two blowholes for breathing.
[From New Latin Cētācea, order name, from Latin cētus, whale; see CETUS.]
ce·tacean, ce·taceous (-shəs) adj.
- disagreement
- disallow
- disallowable
- disallowance
- disambiguate
- disambiguation
- disannul
- disannulment
- disappear
- disappearance
- disappoint
- disappointed
- disappointedly
- disappointing
- disappointingly
- disappointment
- disapprobation
- disapproval
- disapprove
- disapprover
- disapprovingly
- disarm
- disarmament
- disarmer
- disarming