nutrition in WordNet English dictionary

1. a source of materials to nourish the body
   nutriment  nourishment  nutrition  sustenance  aliment  alimentation  victuals 
   
2. the scientific study of food and drink (especially in humans)
   nutrition 
   
3. (physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance
   nutrition