cissoid

Meaning

Noun

• Any of a family of curves defined as the locus of a point, P, on a line from a given fixed point and intersecting two given curves, C₁ and C₂, where the distance along the line from C₁ to P remains constant and equal to the distance from P to C₂.

Origin

• From Ancient Greek κισσός ("ivy") + εἶδος.