/ Dictionary / Index E elasmobranch: Meaning and Definition of Find definitions for: e•las•mo•branch Pronunciation: (i-las'mu-brangk", i-laz'-), [key] — adj. belonging or pertaining to the Elasmobranchii, the subclass of cartilaginous fishes comprising the sharks and rays. —n. an elasmobranch fish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: elasmobranch (Thesaurus) E.L.A.S. elastance Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language