Webster’s Revised Unabridged Dictionary · 1913
Transversal
Trans·ver′sal (·sal), a. [Cf. F. transversal. See Transverse.] Running or lying across; transverse; as, a transversal line. — Trans·ver′sal·ly, adv.
Trans·ver′sal, n. [Cf. F. transversale.] (Geom.) A straight line which traverses or intersects any system of other lines, as a line intersecting the three sides of a triangle or the sides produced.