- noun a constituent of food which is necessary to provide energy or to help the body grow, repair and maintain itself, e.g. a protein, fat or vitamin
- noun a substance that an organism needs to allow it to grow, thrive and reproduce, e.g. carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium or sulfur. Plants obtain their nutrients from the soil, while humans and other animals obtain them from their food, including plants.
- Any substance in food which is utilized in the body for energy production, for the growth, reproduction and repair of tissues or for other physiological functions such as providing bulk or a substrate for micro-organism growth in the bowel
- noun a substance in food which is necessary to provide energy or to help the body grow, e.g. protein, fat or a vitamin