Definition of Dalton, John in English:

Dalton, John

Pronunciation /ˈdôltn/ /ˈdɔltn/

proper noun

  • (1766–1844), English chemist; father of the modern atomic theory. He defined an atom as the smallest part of a substance that could participate in a chemical reaction and argued that elements are composed of atoms. He produced the first table of comparative atomic weights.