The Collaborative International Dictionary
Contaction
Contaction \Con*tac"tion\ (k[o^]n*t[a^]k"sh[u^]n), n. Act of touching. [Obs.]
Wiktionary
contaction
n. (context obsolete English) An act of touching.
Usage examples of "contaction".
For sphærical bodies move by fives, and every globular figure placed upon a plane, in direct volutation, returns to the first point of contaction in the fifth touch, accounting by the Axes of the Diameters or Cardinall points of the four quarters thereof.