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Definition of 'proton'

Word Frequency

proton

(proʊtɒn )
Word forms: plural protons
countable noun
A proton is an atomic particle that has a positive electrical charge.
[technical]
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers
Word Frequency

proton in British

(ˈprəʊtɒn )
noun
a stable, positively charged elementary particle, found in atomic nuclei in numbers equal to the atomic number of the element. It is a baryon with a charge of 1.602176462 × 10–19 coulomb, a rest mass of 1.672 62159 × 10–27 kilogram, and spin 1⁄2
Collins English Dictionary. Copyright © HarperCollins Publishers
Word origin of 'proton'
C20: from Greek prōtos first
Word Frequency

proton in American

(ˈproʊˌtɑn ; prōˈtänˌ)
noun
Particle Physics
a nucleon carrying a positive charge equal to the negative charge of an electron and having a mass of c. 1.673 × 10-27kg (c. 938.2796 MeV/c2, c. 1,836 times the mass of an electron): the number of protons in an atom determines the atomic number of a chemical element
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'proton'
ModL < Gr prōton, neut. of prōtos, first: see proto-

Example sentences containing 'proton'

These examples have been automatically selected and may contain sensitive content. Read more…
The new fund will look to back innovations that advance the treatment of brain tumours, including medicines and proton beam machines. Times, Sunday Times (2016)The new fund will look to back innovations that advance the treatment of brain tumours, including medicines and proton beam machines. Times, Sunday Times (2016)It specialises in funding proton beam treatment. The Sun (2014)He said he had offered to sell his property to pay for the proton beam. Times, Sunday Times (2014)A proton beam stops and is much less harmful, although the dose of radiation is the same. The Sun (2015)Most Western countries have numerous proton beam establishments, which in some cases have been in use for years. Times, Sunday Times (2013)

Word Lists

Chemistry terms, Physics terms

Trends of 'proton'

Used Occasionally. proton is one of the 30000 most commonly used words in the Collins dictionary

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Translations for 'proton'

British English: proton NOUN
A proton is an atomic particle that has a positive electrical charge.
  • American English: proton
  • Brazilian Portuguese: próton
  • Chinese: 质子
  • European Spanish: protón
  • French: proton
  • German: Proton
  • Italian: protone
  • Japanese: プロトン
  • Korean: 양성자
  • European Portuguese: protão
  • Spanish: protón

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Nearby words of 'proton'

  • protolithic
  • protomartyr
  • protomorphic
  • proton
  • proton microscope
  • proton number
  • proton synchrotron

  • All ENGLISH words that begin with 'P'

Related Terms of 'proton'

  • proton number
  • proton therapy
  • proton microscope
  • proton synchrotron
  • proton-pump inhibitor

  • View more related words

Source

Definition of proton from the Collins English Dictionary

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Scrabble score for 'proton': 8
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