positron [ poz-i-tron ] SHOW IPA / ˈpɒz ɪˌtrɒn / PHONETIC RESPELLING 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. QUIZZES QUIZ YOURSELF ON “ITS” VS. “IT’S”!
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Origin of positron
First recorded in 1930–35;
(elec)tron Words nearby positron positive stain
positron emission tomography
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for positron
Another highly regarded method was PET, or
positron emission tomography.
These units are the
positron, the negatron, and the neutron.
The design of the electron brain had completely ignored the polarity of the
As I am the only scholar in my field—the polarity of the
positron—I have never been asked for information. 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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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.
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.
antiparticle for an electron; it has the same mass as an electron, but carries a positive charge. notes for positron
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.