/ Dictionary / Index L lamellibranch: Meaning and Definition of Find definitions for: la•mel•li•branch Pronunciation: (lu-mel'u-brangk"), [key] — n. bivalve. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lamellibranch (Thesaurus) lamelli- lamellicorn Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language