1. (mathematics) a contact of two curves (or two surfaces) at which they have a common tangent
2. the act of caressing with the lips (or an instance thereof)
; [syn: kiss, buss, osculation]
The Collaborative International Dictionary of English v.0.48:
Osculation \Os`cu*la"tion\, n. [L. osculatio a kissing: cf. F.
1. The act of kissing; a kiss.
2. (Geom.) The contact of one curve with another, when the
number of consecutive points of the latter through which
the former passes suffices for the complete determination
of the former curve. --Brande & C.