/ Dictionary / Index S selachian: Meaning and Definition of Find definitions for: se•la•chi•an Pronunciation: (si-lā'kē-un), [key] — adj. belonging to the Selachii, a group of fishes comprising the sharks, skates, and rays. —n. a selachian fish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: selachian (Thesaurus) sel seladang Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language