alimentary canal
noun
variants
or less commonly alimentary tract
plural alimentary canals also alimentary tracts
: the tubular passage typically extending from the mouth to the anus or cloaca that functions in digestion and absorption of food and elimination of residual waste and that in most mammals includes the mouth, pharynx, esophagus, stomach, intestine, and anus : digestive tract
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Merriam-Webster unabridged



