10 letters · 12 points in Scrabble
noun (mathematics) a contact of two curves (or two surfaces) at which they have a common tangent
noun the act of caressing with the lips (or an instance thereof)
originFrom Latin ōsculātiō (“a kissing”), from ōsculor (“to kiss”). By surface analysis, osculate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0