The story
- Frenchélectro-
- Ancient Greekἤλεκτρον (ḗlektron)
- Latinēlectrum
- Latinelectro-
- Englishelectro-
- Proto-Indo-European*ǵónu
- Proto-Hellenic*gónu
- Proto-Hellenic*gonwía
- Ancient Greekγωνίᾱ (gōníā)
- Englishgonio-
- Proto-Indo-European*med-
- Proto-Indo-European*meh₁-
- Ancient Greekμέτρον (métron)
- Englishgoniometer
- English todayelectrogoniometer
From electro- + goniometer.
Etymology from Wiktionary, CC BY-SA 4.0.