/ Dictionary / Index L latent period: Meaning and Definition of Find definitions for: la'tent pe"riod Pronunciation: [key] the interval between exposure to a carcinogen, toxin, or disease-causing organism and development of a consequent disease. the interval between stimulus and reaction. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. latent image latent root Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language