positron positor • positron emission tomography · · · Info · Definitions · Synonyms · Characters · · positron · · Text Latin · · Script 8 · · Length 3 · · Syllables Definitions · · · (noun) an elementary particle with positive charge; interaction of a positron and an electron results in annihilation. Synonyms: antielectron. · · Noun Definition 1 Synonyms · · · antielectron · · Synonym 1 Characters · · i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074