Source : Webster's Revised Unabridged Dictionary (1913)

Tegument \Teg"u*ment\, n. [L. tegumentum, from tegere to cover.
   See {Thatch}, n., and cf. {Detect}, {Protect}.]
   1. A cover or covering; an integument.

   2. Especially, the covering of a living body, or of some part
      or organ of such a body; skin; hide.

Source : WordNet®

tegument
     n : a natural protective covering of the body; site of the sense
         of touch; "your skin is the largest organ of your body"
         [syn: {skin}, {cutis}]