[si-tey-shuh
n] 
| 1. | belonging to the Cetacea, an order of aquatic, chiefly marine mammals, including the whales and dolphins. |
| 2. | a cetacean mammal. |
| ce·ta·cean (sĭ-tā'shən) n. Any of various aquatic, chiefly marine mammals of the order Cetacea, including the whales, dolphins, and porpoises, characterized by a nearly hairless body, anterior limbs modified into broad flippers, vestigial posterior limbs, and a flat notched tail. adj. also ce·ta·ceous (sĭ-tā'shəs) Of, relating to, or belonging to the order Cetacea. [From New Latin Cētācea, order name, from Latin cētus, whale; see Cetus.] |