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• dalton
  dalton

  noun

  atomic mass unit.
• Dalton
  Dalton

  noun

  John, 1766–1844, English chemist and physicist.

dalton

¹ American  

[dawl-tn] / ˈdɔl tn /

noun

Physics.

1. atomic mass unit.

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Dalton ² American  

[dawl-tn] / ˈdɔl tn /

noun

1. John, 1766–1844, English chemist and physicist.

2. Robert, 1867–92, U.S. outlaw in the West.

3. a city in NW Georgia.

4. a male given name.

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Dalton ¹ British  

/ ˈdɔːltən /

noun

1. John. 1766–1844, English chemist and physicist, who formulated the modern form of the atomic theory and the law of partial pressures for gases. He also gave the first accurate description of colour blindness, from which he suffered

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dalton ² British  

/ ˈdɔːltən /

noun

1. another name for atomic mass unit

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Dalton ¹ Scientific  

1. British chemist whose pioneering work on the properties of the atmosphere and gases led him to formulate the atomic theory. Dalton's theory stipulates that all matter is made up of combinations of atoms, the atoms of each element being identical. These atoms can be neither created nor destroyed, but chemical reactions take place through their rearrangement.

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dalton ² Scientific  

/ dôl′tən /

1. See atomic mass unit

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Etymology

Origin of dalton

First recorded in 1935–40; named after J. Dalton

Example Sentences

Then the next inning, Dalton Rushing and Alex Freeland’s back-to-back singles set up Ohtani to score them both when he lined a triple into the right-field corner.

From Los Angeles Times • Jun. 3, 2026

Like Johnson in “The Smashing Machine,” Gyllenhaal plays an UFC contender named Elwood Dalton, who’s disgraced after a tragedy in the ring.

From Salon • May 27, 2026

Neither Modi’s jawboning nor an estimated $100 billion in Reserve Bank of India intervention has stemmed the decline so far, though, says Venkat Pasupuleti, portfolio manager for India at Dalton Investments.

From Barron's • May 21, 2026

Aoife Dalton is partnered by Higgins in midfield with Dannah O'Brien and Emily Lane - who has three try assists in this year's tournament - remaining in the half-backs.

From BBC • May 7, 2026

“There was a Dalton on the list, but the last name and the address and phone number were cut off,” Chip whispered excitedly.

From "Found" by Margaret Peterson Haddix