Breadcrumb Home > Dictionary > Index D Daltonian: Meaning and Definition of Find definitions for: Dal•to•ni•an Pronunciation: (dôl-tō'nē-un), [key] — adj. of John Dalton or his atomic theory. of or pertaining to daltonism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dalton daltonism TrendingHere are the facts and trivia that people are buzzing about. Hard Labor Current Events This Week: June 2023 Languages Spoken in Each Country of the World User's Guide to Environmental Language The Washington Monument: Facts, History & Profile LGBT Pride Month | Biographies of Notable Individuals Civilian Labor Force ✖ Related Content Daily Word Quiz: poetaster Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language