tegmen: a covering: sometimes used for the anterior wings in Orthoptera and Neuroptera.
Its roof, the tegmen tympani, is continuous with that of the attic.
The tegmen tympani are relatively large, but proportionately short.
The tegmen tympani are much reduced and maintain only cartilaginous contact with the posterior arms of the squamosals.
In the Orthoptera the position is quite different, for one tegmen more or less lies over the other.
Thus, if the procedure be carried out through the tegmen tympani, the brain is explored in an upward direction.
tegmen teg·men (těg'mən)
n. pl. teg·mi·na (-mə-nə)
A covering or an integument of a part. Also called tegmentum.