protonic

proton

[proh-ton]
noun Physics, Chemistry.
a positively charged elementary particle that is a fundamental constituent of all atomic nuclei. It is the lightest and most stable baryon, having a charge equal in magnitude to that of the electron, a spin of ½, and a mass of 1.673 × 10− 27 kg. Symbol: P

Origin:
1915–20; noun use of Greek prôton, neuter of prôtos first

protonic, adjective
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World English Dictionary
proton (ˈprəʊtɒn)
 
n
a stable, positively charged elementary particle, found in atomic nuclei in numbers equal to the atomic number of the element. It is a baryon with a charge of 1.602176462 × 10--19 coulomb, a rest mass of 1.672 62159 × 10--27 kilogram, and spin ½
 
[C20: from Greek prōtos first]

protonic (prəʊˈtɒnɪk)
 
adj
chem (of a solvent, such as water) able to donate hydrogen ions to solute molecules

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Etymonline
Word Origin & History

proton
1920, coined by Eng. physicist Ernest Rutherford (1871-1937) from Gk. proton, neut. of protos "first," supposedly because hydrogen was hypothesized as a constituent of all the elements. The word was used earlier in embryology (1893) at a transl. of Ger. anlage ("fundamental thing") based on Aristotle's
phrase he prote ousia to proton.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

proton pro·ton (prō'tŏn')
n.
A stable, positively charged subatomic particle in the baryon family having a mass 1,836 times that of the electron.

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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
proton   (prō'tŏn')  Pronunciation Key 
A stable subatomic particle in the baryon family having a mass of 1.672 × 10-24 grams (1,836 times that of the electron) and a positive electric charge of approximately 1.602 × 10-19 coulombs. Protons make up part of the nucleus of all atoms except hydrogen, whose nucleus consists of a single proton. In neutral atoms, the number of protons is the same as the number of electrons. In positively charged atoms, the number of protons is greater than the number of electrons, and in negatively charged atoms electrons outnumber protons. Protons are believed to be composed of two up quarks and one down quark. See Table at subatomic particle.
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American Heritage
Cultural Dictionary
proton [(proh-ton)]

An elementary particle with a positive charge, found in the nucleus of an atom.

Note: A proton is over a thousand times heavier than an electron.
Note: Protons and neutrons make up most of an atom's mass.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
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