n. 接吻, 密切, 接触

Osculation \Os`cu*la"tion\, n. [L. osculatio a kissing: cf. F.
osculation.]
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.