CETACEAN
cetacean, cetaceous
(adjective) of or relating to whales and dolphins etc
cetacean, cetacean mammal, blower
(noun) large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals
Source: WordNet® 3.1
Etymology
Adjective
cetacean (comparative more cetacean, superlative most cetacean)
Pertaining to the zoologic order Cetacea, or associated with species falling under that taxonomic hierarchy.
(by extension, sometimes, figurative) Resembling or relating to large aquatic mammals.
Synonyms
• (belonging to order Cetacea): cetaceous
Noun
cetacean (plural cetaceans)
An animal belonging to the order Cetacea, including dolphins, porpoises, and whales.
Source: Wiktionary
Ce*ta"cean, n. (Zoöl.)
Definition: One of the Cetacea.
Source: Webster’s Unabridged Dictionary 1913 Edition