Webster’s Revised Unabridged Dictionary · 1913
Striction
Stric′tion (strĭk′shŭn), n. [L. strictio. See Stringent.] The act of constricting, or the state of being constricted.
Line of striction (Geom.), the line on a skew surface that cuts each generator in that point of it that is nearest to the succeeding generator.