Webster’s Revised Unabridged Dictionary · 1913
Osculatory
Os′cu·la·to·ry (·lȧ·tō·ry̆), a. 1. Of or pertaining to kissing; kissing. "The osculatory ceremony." Thackeray.
2. (Geom.) Pertaining to, or having the properties of, an osculatrix; capable of osculation; as, a circle may be osculatory with a curve, at a given point.
Osculatory circle. (Geom.) See Osculating circle of a curve, under Circle. — Osculatory plane (to a curve of double curvature), a plane which passes through three successive points of the curve. — Osculatory sphere (to a line of double curvature), a sphere passing through four consecutive points of the curve.
Os′cu·la·to·ry, n. [LL. osculatorium. See Osculate.] (R. C. Ch.) Same as Pax, 2.