Dictionary.com
definitions
  • synonyms

Dalton

[dawl-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.
Show More
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for john dalton

dalton

noun
  1. another name for atomic mass unit
Show More

Word Origin for dalton

C20: named after John Dalton

Dalton

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
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for john dalton

Dalton

in reference to a system of school education designed by Helen Parkhurst, 1920, from Dalton, Massachusetts, U.S., where it was first adopted. For Daltonism see color blindness.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

john dalton in Medicine

dalton

(dôltən)
n.
  1. atomic mass unit
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

john dalton in Science

Dalton

  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.
Show More

dalton

[dôltən]
  1. See atomic mass unit.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.