/ Dictionary / Index S splint bone: Meaning and Definition of Find definitions for: splint' bone" Pronunciation: [key] one of the rudimentary, splintlike metacarpal or metatarsal bones of the horse or some allied animal, one on each side of the back of each cannon bone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. splint splinter Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language