tegmina

from The Collaborative International Dictionary of English v.0.48

Tegmen \Teg"men\, n.; pl. {Tegmina}. [L., fr. tegere, tectum, to
   cover.]
   1. A tegument or covering.
      [1913 Webster]

   2. (Bot.) The inner layer of the coating of a seed, usually
      thin and delicate; the endopleura.
      [1913 Webster]

   3. (Zool.) One of the elytra of an insect, especially of
      certain Orthoptera.
      [1913 Webster]

   4. pl. (Zool.) Same as {Tectrices}.
      [1913 Webster]