\Trans*ver"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.