[poz-i-tron] /ˈpɒz ɪˌtrɒn/
an elementary particle having the same mass and spin as an but having a charge equal in magnitude to that of the negative charge; the antiparticle of the .
(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
1933, coined from posi(tive) (elec)tron.
positron pos·i·tron (pŏz’ĭ-trŏn’)
A positively charged particle of the same mass and magnititude of charge as an electron. Also called antielectron, positive electron.
The antiparticle that corresponds to an electron. Also called antielectron.
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.
noun 1. the process of producing a PET scan. noun 1. a technique for assessing brain activity and function by recording the emission of positrons from radioactively labelled substances, such as glucose or dopamine positron emission tomography n. Abbr. PET Tomography in which a computer-generated image of local metabolic and physiological functions in tissues is […]
[poz-i-troh-nee-uh m] /ˌpɒz ɪˈtroʊ ni əm/ noun, Physics. 1. a short-lived atomic system consisting of a positron and an electron bound together. /ˌpɒzɪˈtrəʊnɪəm/ noun 1. (physics) a short-lived entity consisting of a positron and an electron bound together. It decays by annihilation to produce two or three photons
Portable Operating System Interface Portable Operating System Interface for UNIX
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