— protonic , adj.
/proh"ton/ , n. Physics, Chem.
a positively charged elementary particle that is a fundamental constituent of all atomic nuclei. It is the lightest and most stable baryon, having a charge equal in magnitude to that of the electron, a spin of 1 / 2 , and a mass of 1.673 × 10 -27 kg. Symbol: P
[ 1915-20; n. use of Gk prôton, neut. of prôtos FIRST ]