English
ellipsograph
From ellipse + -o- + -graph.
Formed from ellipse + -o- + -graph
Proto-Indo-European *leykʷ- ‘to leave behind’
…
Ancient Greek ἐλλείπω ‘to fall short, omit’
Ancient Greek ἔλλειψις ‘a falling short, defect’
Latin ellīpsis
French ellipse ‘ellipse (the locus of a point such that the…’
English ellipse
Today it means
noun A mechanical instrument used to trace out an ellipse.
Language periods are conventional ranges, not dates for this word.
Etymograph / ellipsograph