osculate
verb
[ ˈɒskjʊleɪt ]
• (of a curve or surface) touch (another curve or surface) so as to have a common tangent at the point of contact.
• "the plots have been drawn using osculating orbital elements"
• kiss.
Origin:
mid 17th century: from Latin osculat- ‘kissed’, from the verb osculari, from osculum ‘little mouth or kiss’.
