proton

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proton

 [pro´ton]
an elementary particle of mass number 1, with a positive charge equal to the negative charge of the electron; a constituent particle of every nucleus, the number of protons in the nucleus of each atom of a chemical element being indicated by its atomic number.

pro·ton (p),

(prō'ton),
The positively charged unit of the nuclear mass; protons form part (or in hydrogen 1 the whole) of the nucleus of the atom around which the negative electrons revolve.
[G. ntr. of prōtos, first]

proton

/pro·ton/ (pro´ton) an elementary particle that is the core or nucleus of an ordinary hydrogen atom of mass 1; the unit of positive electricity, being equivalent to the electron in charge and approximately to the hydrogen ion in mass. Symbol p.

proton

[prō′ton]
Etymology: Gk, protos, first
a positively charged particle that is a fundamental component of the nucleus of all atoms. The number of protons in the nucleus of an atom equals the atomic number of the element. Compare electron, neutron. See also atomic mass.

proton

A positively charged particle located in the nucleus of an atom of an element, the number of which governs its chemical properties.

pro·ton

(prō'ton)
The positively charged unit of the nuclear mass; protons form part (or in hydrogen 1, the whole) of the nucleus of the atom around which the negative electrons revolve.
[G. ntr. of prōtos, first]

proton

The positively-charged nucleus of a hydrogen atom. A hydrogen ion and the basis of acids.

proton,

n positively charged subatomic particle that is located in the nucleus of an atom. Its mass is equivalent to that of a neutron. The number of protons is equivalent to the atomic number.

pro·ton

(prō'ton)
The positively charged unit of the nuclear mass; protons form part (or in hydrogen 1, the whole) of the nucleus of the atom around which the negative electrons revolve.
[G. ntr. of prōtos, first]

proton (prō´ton),

n an elementary particle having a positive charge equivalent to the negative charge of the electron but possessing a mass approximately 1845 times as great; the proton is a nuclear particle, whereas the electron is extranuclear.

proton

an elementary particle of mass number 1, with a positive charge equal to the negative charge of the electron; a constituent particle of every nucleus, the number of protons in the nucleus of each atom of a chemical element being indicated by its atomic number.

proton pump
see sodium pump.
proton pump inhibitor
a class of therapeutic agents which are used to counteract the effects of proton pumps in tissues and organs, particularly used in counteracting gastric hypersecretion and acidity.
References in periodicals archive ?
We asked what would be best - they said proton beam RALUCA VINSON MUM OF CANCER LAD ALEXANDER BRETT AND NAGHEMEH KING WERE
Councillor Grant Davey, leader of Northumberland County Council, said: "We are delighted Northumberland has been chosen as the first place in England to be able to provide high energy Proton Beam Therapy.
The Newport centre is the first of three proton beam therapy centres which will be built by Proton Partners International in the UK.
It is anticipated that NHS demand for proton beam therapy abroad will reach 1,500 patients by 2017.
In addition the Government has announced that it is to create two NHS proton beam therapy units which will open in 2018.
Proton beam therapy is a highly targeted type of radiotherapy that can treat hard-to-reach cancers, such as spinal tumours, with a lower risk of damaging the surrounding tissue and causing side effects.
Odd then, that the NHS has just bought two proton beam therapy machines for a staggering PS250m when machines like the one that cured Ashya cost just PS35m each.
COURAGEOUS Ashya cuddles a toy giraffe as he arrives for proton beam therapy.
The Kings were told that the proton beam therapy will not help Ashya's condition.
Proton beam therapy is currently only available to treat eye conditions on the National Health Service in the UK.
The couple, who are in custody, had been seek-seek ing proton beam radiotherapy - currently only available to treat eye conditions on the NHS in the UK.
TSE:6501) today announced that they have completed construction of facilities incorporating the "PROBEAT-RT Proton Beam Therapy System," a novel proton beam cancer treatment system, within the Hokkaido University Hospital.