/ Dictionary / Index C cap screw: Meaning and Definition of Find definitions for: cap' screw" Pronunciation: [key] a fastener for machine parts, threaded along the whole length of its shank and held by threads tapped in the hole in which it is screwed. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. capsaicin Capsian Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language