1) Cross 2) Crosswise 3) Elementary geometry 4) Extending or lying across 5) In a crosswise direction 6) Line crossing two others 7) Measuring instrument 8) Thwartwise 9) Transverse 1) Cross 2) Crosswise 3) Thwartwise 4) Transverse 
[combinatorics] In combinatorial mathematics, given a collection C of sets, a transversal is a set containing exactly one element from each member of the collection. When the sets of the collection are mutually disjoint, each element of the transversal corresponds to exactly one member of C (the set it is a member of). If the original sets ...[geometry] In geometry, a transversal is a line that passes through two lines in the same plane at two distinct points. ==Angles of a Transversal== A transversal produces 8 angles. When the lines are parallel, as is often the case, a transversal produces several congruent and several supplementary angles. Some of these angle pairs have spec...[instrument making] Transversals are a geometric construction on a scientific instrument to allow a graduation to be read to a finer degree of accuracy. Transversals have been replaced in modern times by vernier scales. ==History== Transversals were used at a time when finely graduated instruments were difficult to make. They were found on ...
• (n.) 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. • (a.) Running or lying across; transverse; as, a transversal line.
A line that cuts across parallel lines, intersecting each of them.
A line that crosses/intersects two or more lines.