proton-n; 1 Senses

Sense Number 1: subatomic particle in the nucleus of an atom with a positive electric charge

Commentary: PROTON[+substance][+particle][+subatomic][+in_nucleus][+of_atom][+with_charge][+electric][+positive]

A normal oxygen atom contains eight protons.
The proton is a baryon composed of two up quarks and one down quark which are held together by the strong force.

WordNet 3.0 Sense Numbers: 1