имя существительное [физика] протон
физика протон; протонный
протон
noun Etymology: Greek prōton, neuter of prōtos first — more at prot- an elementary particle that is identical with the nucleus of the hydrogen atom, that along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and that has a mass of 1.673 × 10-27 kilogram • protonic adjective
A home computer made by Acorn Computers under a contract won from the BBC in April 1981.