alimentation

n. nourishment; aid, support

The gastrointestinal tract (GI tract), also called the digestive tract, or the alimentary canal, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste. The major functions of the GI tract are ingestion, digestion, absorption, and excretion.
See more at Wikipedia.org...

Noun
1. a source of materials to nourish the body
(synonym) nutriment, nourishment, nutrition, sustenance, aliment, victuals
(hypernym) food, nutrient
(hyponym) milk
(derivation) nutrify, aliment, nourish
2. the act of supplying food and nourishment
(synonym) feeding
(hypernym) provision, supply, supplying
(hyponym) suckling, lactation
(derivation) nutrify, aliment, nourish

n. alimentation, food, nourishment, supply; feed, feeding

(n.)
The act or process of affording nutriment; the function of the alimentary canal.
  

(n.)
State or mode of being nourished.