/ Dictionary / Index P percussion flaking: Meaning and Definition of Find definitions for: percus'sion flak"ing Pronunciation: [key] a method of forming a flint tool by striking flakes from a stone core with another stone or a piece of bone or wood. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. percussion cap percussion instrument 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