English

electrogravity

From electro- + gravity.

Ancient Greek ἤλεκτρον ‘amber’

French electrum

French électro-

Proto-Indo-European *gʷreh₂- ‘heavy’

…

Proto-Italic *gʷraus

Latin gravis ‘heavy’

Latin gravitās ‘weight, heaviness’

French gravité ‘seriousness; gravity’

Today it means

noun A hypothetical unification of electromagnetism and gravity.

Language periods are conventional ranges, not dates for this word.

Etymograph / electrogravity