arachnoid trabecula

a·rach·noid tra·bec·u·la

[TA]
fine, delicate strands composed of fibroblast and extracellular collagen that traverse the subarachnoid space between the arachnoid mater, which is attached to the dura, and the pia mater, which is adherent to the surface of the brain.
Synonym(s): trabeculae arachnoideae [TA]