Learn how to say Osculant correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word osculate:
1 Mathematics (of a curve or surface) touch (another curve or surface) so as to have a common tangent at the point of contact:
(as adjective osculating)
the plots have been drawn using osculating orbital elements
2 formal or humorous kiss.
mid 17th century: from Latin osculat- ‘kissed’, from the verb osculari, from osculum ‘little mouth or kiss’