D defs.my
Entry 1 sense Webster, 1913

Quadratrix

· Quad·ra·trix · IPA
01 n. A curve made use of in the quadrature of other curves; as the quadratrix, of Dinostratus, or of Tschirnhausen.
pl. -trixes, -trices ((#))
  1. 1.
    A curve made use of in the quadrature of other curves; as the quadratrix, of Dinostratus, or of Tschirnhausen.(Geom.)