/ Dictionary / Index M mechanical pencil: Meaning and Definition of Find definitions for: mechan'ical pen'cil Pronunciation: [key] a pencil for holding lead that can be extended by mechanical means. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mechanical metallurgy mechanical pulp Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language