tangence

plural tangences

1. alternativecountableuncountableAlternative form of tangency.

   […]to assure the belt passes only through said points of tangence,[…].

   1957, Canadin Patent Office, The Canadian Patent Office Record and Register of Copyrights, volume 85, numbers 10-12, page 8721

   2 more examples

   The points of intangence, or extangence, of two circumferences are the points of tangence of their intangents, or extangents.

   1874, L J V. Gerard, The elements of geometry, in eight books; or, First step in applied logic, page 106

   The latter enables designers and engineers to describe geometric entities (points, lines, planes, curves, surfaces) by specification of constraints: distances, angles, incidences, tangences between geometric entities.

   2006, ACM Symposium on Solid and Physical Modeling: Proceedings, page 185