proton Definition
pro·ton (prō′tän′)
noun
Particle Physics a nucleon carrying a positive charge equal to the negative charge of an electron and having a mass of c. 1.673 × 10kg (c. 938.2796 MeV/c, c. 1,836 times the mass of an electron): the number of protons in an atom determines the atomic number of a chemical element
Etymology: ModL < Gr prōton, neut. of prōtos, first: see proto-
proton Usage Examples
Converse of object
- diffract: Finally, a first analysis of the leading proton spectrometer data where the diffracted proton is directly measured is presented in section 2.4.
- collide: LHC will collide protons into protons at a center-of-mass energy of about 14 TeV.
- accelerate: To accelerate protons to the highest observed energies on flare timescales, it is necessary to invoke anomalous resistivity in the MHD solution.
- donate: The acid hydrogen chloride donates a proton to the base ammonia.
- pump: These enzymes pump protons across the inner membrane, building up a proton gradient.
- accept: The A - ion is a base because it is accepting a proton from the H 3 O + .
Adjective modifier
- outgoing: So far we have only considered the case of small- t diffraction with respect to the outgoing proton.
- energetic: Our findings are discussed with respect to previous works on the spectrum of energetic protons in the 10 MeV to GeV energy range.
- leading: Dissociation of virtual photons in events with a leading proton at HERA.
Modifies a noun
- inhibitor: Recommended doses of proton pump inhibitors are outlined in Table 1.
- acceptor: A base is the opposite of an acid; it is a proton acceptor.
- pump: Recommended doses of proton pump inhibitors are outlined in Table 1.
- affinity: Below is a table of proton affinities for various gaseous components.
- parton: We are investigating the determination of the uncertainty of the proton parton density functions.
Preposition: across
membrane: These enzymes pump protons across the inner membrane, building up a proton gradient.
Preposition: in
- nucleus: Atomic number The number of protons in the nucleus of an atom.
- atom: The number of protons in an atom gives the atom its atomic number.
Noun used with modifier
- amide: FEBS Letters 277 ( 1-2 ) 185-188 ( 1990 ) Proline lacks an amide proton when found within proteins.
- high-energy: The principle danger of the Van Allen belts is high-energy protons, which are not that difficult to shield against.
Browse dictionary entries near proton
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