Dictionary
Thesaurus
Encyclopedia
Translator
Web
Related Searches
Nearby Words

neutrons

 - 6 dictionary results

neu⋅tron

  [noo-tron, nyoo-]
Use neutrons in a Sentence
–noun Physics.
an elementary particle having no charge, mass slightly greater than that of a proton, and spin of 1/2 : a constituent of the nuclei of all atoms except those of hydrogen. Symbol: n
Origin:
1920–25; neutr(o)- + -on 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To neutrons
neu·tron   (nōō'trŏn', nyōō'-)   
n.   Abbr. n
An electrically neutral subatomic particle in the baryon family, having a mass 1,839 times that of the electron, stable when bound in an atomic nucleus, and having a mean lifetime of approximately 1.0 × 103 seconds as a free particle. It and the proton form nearly the entire mass of atomic nuclei. See Table at subatomic particle.

[neutr(al) + -on1.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Cultural Dictionary

neutron

An elementary particle without an electrical charge; one of the building blocks of the nucleus of the atom. A neutron has about the same mass as a proton.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Word Origin & History

neutron 
1921, coined by W.D. Harkins of Chicago from neutr(al) + -on, as in electron. First record of neutron bomb is from 1960.
Online Etymology Dictionary, © 2001 Douglas Harper
Cite This Source
Medical Dictionary

Main Entry: neu·tron
Pronunciation: 'n(y)ü-"trän
Function: noun
: an uncharged elementary particle that has a mass nearly equal to that ofthe proton and is present in all known atomic nuclei except the hydrogen nucleus
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
Cite This Source
Medical Dictionary

neutron neu·tron (n&oomacr;'trŏn', ny&oomacr;'-)
n.
An electrically neutral subatomic particle in the baryon family, having a mass 1,839 times that of the electron, stable when bound in an atomic nucleus, and having a mean lifetime of approximately 1.0×103 seconds as a free particle. It and the proton form nearly the entire mass of atomic nuclei.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Search another word or see neutrons on Thesaurus | Reference
FacebookTwitterFollow us:
Partner Sites:
Ask AnswersEviteExpediaHotelsHotwireLife123LiveDailyMy Way