tegmentum

A covering or integument of an organ or body part.

The ventral part of the midbrain.

The outer porous layer of the shell of polyplacophorous mollusks or chitons, which covers the inner porcelanous articulamentum.

In botany, the scaly coat which covers the leaf-buds of deciduous trees; also, one of the scales of such covering.

In anatomy, the larger and deeper or upper of two parts into which each crus cerebri is divisible, separated from the crusta by the substantia nigra.

A covering; — applied especially to the bundles of longitudinal fibers in the upper part of the crura of the cerebrum.

The ventral portion of the midbrain, divided from the tectum by the cerebral aqueduct and the periaqueductal grey

Containing the following nuclei: red nucleus, substantia nigra, ventral tegmental area