proton

Fetched 2026-10-26 (cache).

Synonyms: proto, croton, proteon, photon, proto-, roton, groton, protan, procon

Antonyms: proto, croton, proteon, photon, proto-, roton, groton, protan, procon

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{C|en|Nuclear physics}} {{lb|en|particle}} A [[positively]] [[charge]]d [[subatomic particle]] forming part of the [[nucleus]] of an atom and determining the [[atomic number]] of an [[element]], composed of two [[up quark]]s and a [[down quark]]. {{defdate|from 1920|refn=OED}}
2. {{lb|en|obsolete|anatomy}} {{synonym of|en|primordium}}. {{defdate|1893|1903|refn=OED}}

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.