The Collaborative International Dictionary of English v.0.48:

Intestine \In*tes"tine\, a. [L. intestinus, fr. intus on the
   inside, within, fr. in in: cf. F. intestine. See In.]
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   1. Internal; inward; -- opposed to external.
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            Epilepsies, fierce catarrhs,
            Intestine stone and ulcers.           --Milton.
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   2. Internal with regard to a state or country; domestic; not
      foreign; -- applied usually to that which is evil; as,
      intestine disorders, calamities, etc.
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            Hoping here to end
            Intestine war in heaven, the arch foe subdued.
                                                  --Milton.
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            An intestine struggle . . . between authority and
            liberty.                              --Hume.
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   3. Depending upon the internal constitution of a body or
      entity; subjective.
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            Everything labors under an intestine necessity.
                                                  --Cudworth.
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   4. Shut up; inclosed. [R.] --Cowper.
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The Collaborative International Dictionary of English v.0.48:

Intestine \In*tes"tine\, n.; pl. Intestines. [L. intestinum:
   cf. F. intestin. See Intestine, a.]
   [1913 Webster]
   1. (Anat.) That part of the alimentary canal between the
      stomach and the anus. See Illust. of Digestive apparatus.
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   2. pl. The bowels; entrails; viscera.
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   Large intestine (Human Anat. & Med.), the lower portion of
      the bowel, terminating at the anus. It is adapted for the
      retention of fecal matter, being shorter, broader, and
      less convoluted than the small intestine; it consists of
      three parts, the c[ae]cum, colon, and rectum.

   Small intestine (Human Anat. & Med.), the upper portion of
      the bowel, in which the process of digestion is
      practically completed. It is narrow and contorted, and
      consists of three parts, the duodenum, jejunum, and ileum.
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WordNet (r) 3.0 (2006):

intestine
    n 1: the part of the alimentary canal between the stomach and
         the anus [syn: intestine, bowel, gut]