/ Dictionary / Index B Becquerel rays: Meaning and Definition of Find definitions for: Becquerel' rays" Pronunciation: [key] (formerly) rays emitted by radioactive substances. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Becquerel effect becripple Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language