8 letters · 12 points in Scrabble
noun large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals
adjective of or relating to whales and dolphins etc
originFrom translingual Cetacea, from Latin cētus (“whale”), + -an.
Etymology from Wiktionary, CC BY-SA 3.0