Source : Webster's Revised Unabridged Dictionary (1913)

Gut \Gut\, n. [OE. gut, got, AS. gut, prob. orig., a channel,
   and akin to ge['o]tan to pour. See {FOUND} to cast.]
   1. A narrow passage of water; as, the Gut of Canso.

   2. An intenstine; a bowel; the whole alimentary canal; the
      enteron; (pl.) bowels; entrails.

   3. One of the prepared entrails of an animal, esp. of a
      sheep, used for various purposes. See {Catgut}.

   4. The sac of silk taken from a silkworm (when ready to spin
      its cocoon), for the purpose of drawing it out into a
      thread. This, when dry, is exceedingly strong, and is used
      as the snood of a fish line.

   {Blind gut}. See {C[AE]cum}, n.
      (b) .

Source : WordNet®

blind gut
     n : the cavity in which the large intestine begins and into
         which the ileum opens; "the appendix is an offshoot of
         the cecum" [syn: {cecum}, {caecum}]