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[dawl-tn] /ˈdɔl tn/
noun, Physics.
Origin of dalton
First recorded in 1935-40; named after J. Dalton


[dawl-tn] /ˈdɔl tn/
John, 1766–1844, English chemist and physicist.
Robert, 1867–92, U.S. outlaw in the West.
a city in NW Georgia.
a male given name. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for dalton
Contemporary Examples
Historical Examples
  • My father is an old man,” said Richard; and then with an outburst, “And a damned sight finer fellow than either you or dalton!

  • "Wait till after I'm married before you begin," said dalton.

    Our Casualty And Other Stories James Owen Hannay, AKA George A. Birmingham
  • "I cannot possibly spare you, Mr. dalton, at this moment;" and the man of law withdrew, with a most respectful obeisance.

    The Daltons, Volume I (of II) Charles James Lever
  • I supposed that Mr. dalton would attend to the matter, since I was out.

    From the Car Behind Eleanor M. Ingram
  • He did not know which and he did not care; it was enough that he could look straight at dalton and not even change color!

    In And Out Edgar Franklin
British Dictionary definitions for dalton


another name for atomic mass unit
Word Origin
C20: named after John Dalton


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
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
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Word Origin and History for 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.

Online Etymology Dictionary, © 2010 Douglas Harper
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dalton in Medicine

dalton dal·ton (dôl'tən)
See atomic mass unit.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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dalton in Science
See atomic mass unit.
Dalton, John 1766-1844.  
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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