English

quadrisecant

From quadri- + secant.

Proto-Indo-European *kʷetwṓr

Proto-Italic *kʷettwōr ‘four’

Latin quattuor ‘four’

Proto-Indo-European *sek- ‘to cut’

Proto-Italic *sekaō ‘to cut’

Latin secō ‘to cut’

Latin secāns ‘cutting’

Today it means

noun A line that passes through four points of the curve.

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

Etymograph / quadrisecant