1. 
[syn: cross(a), transverse, transversal, thwartwise]
The Collaborative International Dictionary of English v.0.48:
Transversal \Trans*ver"sal\, a. [Cf. F. transversal. See
   Transverse.]
   Running or lying across; transverse; as, a transversal line.
   -- Trans*ver"sal*ly, adv.
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Transversal \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.
   [1913 Webster]
WordNet (r) 3.0 (2006):
transversal
    adj 1: extending or lying across; in a crosswise direction; at
           right angles to the long axis; "cross members should be
           all steel"; "from the transverse hall the stairway
           ascends gracefully"; "transversal vibrations";
           "transverse colon" [syn: cross(a), transverse,
           transversal, thwartwise]