D defs.my
Entry 2 senses Webster, 1913

Osculation

· Os·cu·la·tion · IPA /ˌɑs.kjuˈleɪ.ʃən/
01 n. The act of kissing; a kiss.
  1. 1.
    The act of kissing; a kiss.
  2. 2.
    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.(Geom.)