/ Dictionary / Index L long bone: Meaning and Definition of Find definitions for: long' bone" Pronunciation: [key] — Anat. Anat.(in vertebrate animals) any of the long, cylindrical, marrow-containing bones of the limbs: the long bone of the arm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Longboat Key longbow 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