American Heritage® Dictionary of the English Language, Fourth Edition
- n. A stable, positively charged subatomic particle in the baryon family having a mass 1,836 times that of the electron. See Table at subatomic particle.
Century Dictionary and Cyclopedia
- n. The first inception or rudiment of a structure or organ in the embryo: a term suggested as an equivalent of the German anlage.
- n. A term designating certain products of tryptie digestion which are obtained from the protamins and which, supposedly, are intermediary between these and the end-products.
- n. physics positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element; the nucleus of the most common isotope of hydrogen; composed of two up quarks and a down quark
- n. a stable particle with positive charge equal to the negative charge of an electron
- From Ancient Greek πρῶτον (prōton), neuter of πρῶτος (prōtos, "first") (Wiktionary)
- From Greek prōton, neuter of prōtos, first; see per1 in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Long-term proton pump inhibitor therapy and risk of hip fracture.”
“One proton is just like another; but sodium and chlorine are distinct because of the number and arrangement of these parts.”
“Taking away or adding just one proton from the nucleus of an element would turn it into a completely different element with completely different properties.”
“The device is called a proton precession magnetometer.”
“A proton is an infinitesimal part of an atom, which is itself of course an insubstantial thing.”
“This is crucial because the difference in proton concentration between the inside and the outside of the cell is the basis of the cellular energy-storage system.”
“The antiprotons were produced in proton-nucleus collisions and successively accumulated and formed into a narrow beam by a cooling method called stochastic cooling and invented by the”
“Thus the new investigations gave the surprising result that the electrical charge within the proton is concentrated to smaller components of negligible size.”
“I was director of the Harvard Cyclotron during its construction and early operation and participated in proton-proton scattering experiments with that cyclotron.”
“Inelastic collision between an electron and a proton is illustrated in figure a. When the wavelength of the photon is long, it "sees" the charge of the whole proton (elastic or slightly inelastic collisions), but when the wavelength becomes sufficiently short, the photon "sees" primarily any charged small constituents within the proton (deep inelastic collisions).”
These user-created lists contain the word ‘proton’.
I've noticed many, many words start with PRO and this is just a collection of them.
Only the most awesome 'P' words
Particles, particles, particles!
based upon per- indo-european root
I've been meaning to make this list for at least a year, to go with Really Cool Two-Letter Words, Three-Letter Words, Four-Letter Words, Slightly Less Cool Four-Letter Words, and Five-Letter Words....
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