/ Dictionary / Index L law of segregation: Meaning and Definition of Find definitions for: law' of segrega'tion Pronunciation: [key] — Genetics. Genetics. the principle, originated by Gregor Mendel, stating that during the production of gametes the two copies of each hereditary factor segregate so that offspring acquire one factor from each parent. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. law of refraction law of sines Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language