triangular lamella


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tela cho·roi'dea of third ven·tri·cle

a double fold of pia mater, enclosing subarachnoid trabeculae, between the fornix above and the epithelial roof of the third ventricle and the thalami below; at each lateral margin is a vascular fringe projecting into the choroidal fissure of the lateral ventricle; on its undersurface are several small vascular projections filling the folds of the ependymal roof of the third ventricle.

triangular lamella

The small fibrous lamina between the choroid plexuses of the third ventricle of the brain.
See also: lamella