English
electrogoniometer
From electro- + goniometer.
A compound of electro- + gonio- + -meter + goniometer
Proto-Indo-European *ǵónu ‘knee’
Proto-Hellenic *gónu ‘knee’
Proto-Hellenic *gonwía
Ancient Greek γωνίᾱ
Ancient Greek μέτρον ‘something used to measure: measure, rule, weight’
English goniometer
Today it means
noun An electronic goniometer
Language periods are conventional ranges, not dates for this word.
Etymograph / electrogoniometer