anion

noun

Etymology: Etymology tree Proto-Indo-European *h₂en- Proto-Hellenic *aná Ancient Greek ᾰ̓νᾰ́ (ănắ) Ancient Greek ᾰ̓νᾰ- (ănă-) Proto-Indo-European *h₁ey- Proto-Indo-European *h₁éyti Proto-Hellenic *éimi Ancient Greek ῐ̓όν (ĭón) Ancient Greek ἀνῐόν (anĭón)lbor. English anion Learned borrowing from Ancient Greek ἀνιόν (anión, “(thing) going up”), neuter present participle of ἄνειμι (áneimi, “go up”), from ἀνά (aná, “up”) + εἶμι (eîmi, “go”). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year. By surface analysis, an- (“up, away, forward”) + ion.

1. A negatively charged ion.