from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An elementary particle having the same mass and magnitude of charge as an electron but exhibiting a positive charge; a positive electron. Also called antielectron.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The antimatter equivalent of an electron, having the same mass but a positive charge
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an elementary particle with positive charge; interaction of a positron and an electron results in annihilation
The anti-particle of a negatively charged electron, for example, has a positive charge and is called a positron.
The positron is slowed down by the water and destroyed together with an electron (matter meets antimatter), whereupon two photons (light particles) are created.
Referring to the so-called positron, the positive particle regarded as the polar opposite of the negative electron, he remarks: 'A positron is a hole from which an electron has been removed; it is a bung-hole which would be evened up with its surroundings if an electron were inserted. ...
When people are suffering with major depression, research has shown that a type of nuclear medicine scan called positron emission tomography PET can often reveal specific regions of their brains with decreased metabolic activity—a reduced flow of chemical messengers between nerve cells.
A positron is the antimatter equivalent of an electron, and perhaps the easiest anti-particle to manufacture and store.
In another series of tests, Savic and Lindström used a technique called positron emission tomography PET to look at brain wiring in a smaller group of volunteers.
One evening in 2003, after yet another test, a type of brain scan called a positron emission tomography, Mr. Kammerer's physician called.
There's some very compelling issues -- very compelling data using some of the state of the art imaging techniques called positron emission tomography (ph) or functional magnetic resonance imaging.
In the study, a team at the University of Groningen led by Gert Holstege scanned the brains of 13 women and 11 men using a technique called positron emission tomography PET, while they manually stimulated to orgasm by their partners.
For example, the antimatter version of the negatively charged electron is the positively charged anti-electron, known as a positron.
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