crossunder

plural crossunders

1. A place where one thing crosses under another.

   The pits […] will include a series of steps and an elevator that will enable access to the crossunder

   2011 July 26, “Major Milestone for the Panama Canal Expansion, Permanent Concrete Work Begins”, in The Maritime Executive

   2 more examples

   The crossovers and crossunders of the warp yarns form diagonal twill lines across both the support and the contact surfaces

   1998, Scott D. Quigley, Papermakers forming fabric with weft dominated paper support surface, US Patent US5988229 A

   […] every crossunder included in the final layout was scrupulously analyzed for any possible impact […]

   2013, Jim Williams, Analog Circuit Design: Art, Science and Personalities, →ISBN, page 258