meaning of transversal
1.  Running or lying across; transverse; as, a transversal line. 
2.  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. 
3.  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 
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