tegmentum teg·men·tum (těg-měn'təm)
n. pl. teg·men·ta (-tə)
The mesencephalic tegmentum.
tegmentum, teg-men′tum, n. the scaly covering of the leaf-buds of deciduous trees.
The tegmentum is formed by the fold of mantle covering the edge of the articulamentum, and extends over the latter from the sides.
The tegmentum is much reduced in Acanthochiton, and absent in the adult Cryptochiton.