| triangular lamella | 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. Synonym: tela choroidea ventriculi tertii, tela choroidea superior, triangular lamella, velum interpositum, velum triangulare. (05 Mar 2000) |
|---|---|
| lamella | A thin, plate-like layer, middle lamella, the layer between the walls of two adjacent plant cells. (09 Oct 1997) |
| lamella of bone | A concentric, circumferential, or interstitial lamella. (05 Mar 2000) |
| leading lamella | <cell biology> Anterior region of a crawling cell, such as a fibroblast, from which most cytoplasmic granules are excluded. (18 Nov 1997) |