trabeculae

from The Collaborative International Dictionary of English v.0.48

Trabecula \Tra*bec"u*la\, n.; pl. {Trabeculae} (-l[=e]). [L., a
   little beam.] (Anat.)
   A small bar, rod, bundle of fibers, or septal membrane, in
   the framework of an organ part.
   [1913 Webster]