Osculatrix
Pronunciation : Os`cu*la"trix
Part of Speech : n.;
Etymology : [NL.] (Geom.)
Definition : Defn: A curve whose contact with a given curve, at a given point, is of a higher order (or involves the equality of a greater number of successive differential coefficients of the ordinates of the curves taken at that point) than that of any other curve of the same kind.
pl. Osculatrixes.
Source : Webster's Unabridged Dictionary, 1913