proton

[ proh-ton ]

/ ˈproʊ tɒn /

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 of proton

Term first suggested in 1920 by English physicist Ernest Rutherford as noun use of Greek prôton, neuter of prôtos “first,” the proton being the constituent of hydrogen nuclei, and formed on the analogy of electron; see first, electron

OTHER WORDS FROM proton

pro·ton·ic, adjective

Words nearby proton

protolanguage, protolithic, protolog, protomartyr, protomorphic, proton, protonema, protonic, Protonix, proton microscope, proton number

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for proton

Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton.
Are Comets the Origin of Earth’s Oceans?|Matthew R. Francis|December 14, 2014|DAILY BEAST
You have the atom, which has the neutron, the electron, the proton.
‘Crazy’ Harlem Pastor Hates on Obama and Gays|Olivia Nuzzi|September 28, 2014|DAILY BEAST
At any rate I do know that the atom called “hydrogen” is formed by just one proton and one electron.
Letters of a Radio-Engineer to His Son|John Mills
Two is company when one is an electron and the other a proton but three is a crowd always.
Letters of a Radio-Engineer to His Son|John Mills

The PDP-9 first tries to reconstruct a vertex from the proton trajectories.
On-Line Data-Acquisition Systems in Nuclear Physics, 1969|H. W. Fulbright et al.
One kind of speck is called “electron” and the other kind “proton.”
Letters of a Radio-Engineer to His Son|John Mills
The number at the lower left of each element symbol in the above reaction is the proton number.
A Brief History of Element Discovery, Synthesis, and Analysis|Glen W. Watson

British Dictionary definitions for proton

proton

/ (ˈprəʊtɒn) /

noun

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 1/2

Word Origin for proton

C20: from Greek prōtos first

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for proton

proton

[ (proh-ton) ]

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

notes for proton

A proton is over a thousand times heavier than an electron.

notes for proton

Protons and neutrons make up most of an atom's mass.

Medical definitions for proton

proton

[ prō′tŏn′ ]

n.

A stable, positively charged subatomic particle in the baryon family having a mass 1,836 times that of the electron.

Scientific definitions for proton

proton

[ prō′tŏn′ ]

A stable subatomic particle in the baryon family having a mass of 1.672 X 10-24 grams (1,836 times that of the electron) and a positive electric charge of approximately 1.602 X 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.

单词	proton
释义	proton [ proh-ton ] / ˈproʊ tɒn / 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 of proton Term first suggested in 1920 by English physicist Ernest Rutherford as noun use of Greek prôton, neuter of prôtos “first,” the proton being the constituent of hydrogen nuclei, and formed on the analogy of electron; see first, electron OTHER WORDS FROM proton pro·ton·ic, adjective Words nearby proton protolanguage, protolithic, protolog, protomartyr, protomorphic, proton, protonema, protonic, Protonix, proton microscope, proton number Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for proton Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton. Are Comets the Origin of Earth’s Oceans?\|Matthew R. Francis\|December 14, 2014\|DAILY BEAST You have the atom, which has the neutron, the electron, the proton. ‘Crazy’ Harlem Pastor Hates on Obama and Gays\|Olivia Nuzzi\|September 28, 2014\|DAILY BEAST At any rate I do know that the atom called “hydrogen” is formed by just one proton and one electron. Letters of a Radio-Engineer to His Son\|John Mills Two is company when one is an electron and the other a proton but three is a crowd always. Letters of a Radio-Engineer to His Son\|John Mills The PDP-9 first tries to reconstruct a vertex from the proton trajectories. On-Line Data-Acquisition Systems in Nuclear Physics, 1969\|H. W. Fulbright et al. One kind of speck is called “electron” and the other kind “proton.” Letters of a Radio-Engineer to His Son\|John Mills The number at the lower left of each element symbol in the above reaction is the proton number. A Brief History of Element Discovery, Synthesis, and Analysis\|Glen W. Watson British Dictionary definitions for proton proton / (ˈprəʊtɒn) / noun 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 1/2 Word Origin for proton C20: from Greek prōtos first Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for proton proton [ (proh-ton) ] An elementary particle with a positive charge, found in the nucleus of an atom. notes for proton A proton is over a thousand times heavier than an electron. notes for proton Protons and neutrons make up most of an atom's mass. 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. Medical definitions for proton proton [ prō′tŏn′ ] n. A stable, positively charged subatomic particle in the baryon family having a mass 1,836 times that of the electron. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for proton proton [ prō′tŏn′ ] A stable subatomic particle in the baryon family having a mass of 1.672 X 10-24 grams (1,836 times that of the electron) and a positive electric charge of approximately 1.602 X 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. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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