Trabecula

·noun A small bar, rod, bundle of fibers, or septal membrane, in the framework of an organ part.

trabecula
trăbĕcŭla or trăbĭcŭla, ae, f. dim. [trabs], a little beam , Cato R. R. 18, 5; Vitr. 10, 21; ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.