Breadcrumb Home > Dictionary Cite Meaning of SCR Find definitions for: SCR Pronunciation: [key] — Electronics. Electronics. silicon-controlled rectifier. scr. Pronunciation: [key] scruple. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. scowl scrabble Related Content Daily Word Quiz: persiflage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language