tegmenta

from The Collaborative International Dictionary of English v.0.48

Tegmentum \Teg*men"tum\, n.; pl. {Tegmenta}. [L., a covering.]
   (Anat.)
   A covering; -- applied especially to the bundles of
   longitudinal fibers in the upper part of the crura of the
   cerebrum.
   [1913 Webster]