nutrient in WordNet English dictionary

1. of or providing nourishment
   "good nourishing stew"
   alimentary  alimental  nourishing  nutrient  nutritious  nutritive 
   

1. any substance that can be metabolized by an animal to give energy and build tissue
   food  nutrient 
   
2. any substance (such as a chemical element or inorganic compound) that can be taken in by a green plant and used in organic synthesis
   nutrient