Alimentary canal

from WordNet (r) 3.0 (2006)

alimentary canal
    n 1: tubular passage of mucous membrane and muscle extending
         about 8.3 meters from mouth to anus; functions in digestion
         and elimination [syn: {alimentary canal}, {alimentary
         tract}, {digestive tube}, {digestive tract},
         {gastrointestinal tract}, {GI tract}]

from The Collaborative International Dictionary of English v.0.48

Alimentary \Al`i*men"ta*ry\, a. [L. alimentarius, fr. alimentum:
   cf. F. alimentaire.]
   Pertaining to aliment or food, or to the function of
   nutrition; nutritious; alimental; as, alimentary substances.
   [1913 Webster]

   {Alimentary canal}, the entire channel, extending from the
      mouth to the anus, by which aliments are conveyed through
      the body, and the useless parts ejected.
      [1913 Webster]