Proton Definition

prōtŏn
protons
noun
A nucleon carrying a positive charge equal to the negative charge of an electron and having a mass of c. 1.673 × 10-27 kg (c. 938.2796 MeV/c2, c. 1,836 times the mass of an electron): the number of protons in an atom determines the atomic number of a chemical element.
Webster's New World

(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.

Wiktionary

Other Word Forms of Proton

Noun

Singular:
proton
Plural:
protons

Origin of Proton

  • From Greek prōton neuter of prōtos first per1 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek πρῶτον (prōton), neuter of πρῶτος (prōtos, “first")

    From Wiktionary

Find Similar Words

Find similar words to proton using the buttons below.

Words Starting With

Words Ending With

Unscrambles

proton