Intestinal \In*tes"ti*nal\, a. [Cf. F. intestinal.] Of or pertaining to the intestines of an animal; as, the intestinal tube; intestinal digestion; intestinal ferments. {Intestinal canal}. Same as {Intestine}, n. {Intestinal worm} (Zo["o]l.), any species of helminth living in the intestinal canal of any animal. The species are numerous.