- The definition of a proton is a particle with a positive charge that is in the nucleus of an atom.
An example of a proton is the single proton in the nucleus of a hydrogen atom.
proton definition by Webster's New World
Origin: Modern Latin ; from Classical Greek prōton, neuter of prōtos, first: see proto-
proton definition by American Heritage Dictionary
noun Abbr. p
Origin: From Greek prōton, neuter of prōtos, first; see per1 in Indo-European roots.
- pro·tonˈic adjective
proton - Cultural Definition
proton - Medical Definition
proton - Science Definition