Definition of Dalton, John in English:

Dalton, John

Syllabification: Dal·ton, John
Pronunciation: /ˈdôltn
  • (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.

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Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
elaborate ornamentation of a vocal melody