The story
- Proto-Hellenic*autós
- Proto-Indo-European*h₂ew
- Ancient Greekαὖ (aû)
- Ancient Greekτόν (tón)
- Ancient Greekαὐτός (autós)
- Ancient Greekαὐτο- (auto-)
- Englishauto-
- Englishfluorescing
- English todayautofluorescing
From auto- + fluorescing.
Etymology from Wiktionary, CC BY-SA 4.0.