positron

[ poz-i-tron ]
/ ˈpɒz ɪˌtrɒn /
|

noun Physics.

an elementary particle having the same mass and spin as an electron but having a positive charge equal in magnitude to that of the electron's negative charge; the antiparticle of the electron.

Nearby words

  1. positive vetting,
  2. positive-negative pressure breathing,
  3. positively,
  4. positivism,
  5. positivity,
  6. positron emission tomography,
  7. positronium,
  8. posole,
  9. posologic,
  10. posology

Origin of positron

First recorded in 1930–35; posi(tive) + (elec)tron


Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for positron


British Dictionary definitions for positron

positron

/ (ˈpɒzɪˌtrɒn) /

noun

physics the antiparticle of the electron, having the same mass but an equal and opposite charge. It is produced in certain decay processes and in pair production, annihilation occurring when it collides with an electron

Word Origin for positron

C20: from posi (tive + elec) tron

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 positron

positron

n.

1933, coined from posi(tive) (elec)tron.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for positron

positron

[ pŏzĭ-trŏn′ ]

n.

A positively charged particle of the same mass and magnitude of charge as an electron.antielectron positive electron

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for positron

positron

[ pŏzĭ-trŏn′ ]

The antiparticle that corresponds to an electron. Also called antielectron
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Culture definitions for positron

positron

[ (poz-i-tron) ]

The antiparticle for an electron; it has the same mass as an electron, but carries a positive charge.

Note

Positrons are found in collisions initiated by cosmic rays.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.