positron [ poz-i-tron ] SHOW IPA / ˈpɒz ɪˌtrɒn / PHONETIC RESPELLING EXAMPLES | WORD ORIGIN 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.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for positron
The uncertainty in the
positron counts are huge at the high energy end of the AMS-02 results.
Another highly regarded method was PET, or
positron emission tomography.
As I am the only scholar in my field—the polarity of the
positron—I have never been asked for information.
The design of the electron brain had completely ignored the polarity of the
positron. British Dictionary definitions for positron 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
posi ( tive + elec) tron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for positron n.
1933, coined from
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for positron 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 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 Note
Positrons are found in collisions initiated by
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.