Parenteral nutrition (PN) is the feeding of nutritional products to a person intravenously, bypassing the usual process of eating and digestion.
Saprotrophic nutrition or lysotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of decayed (dead or waste) organic matter.
Nutrition is the biochemical and physiological process by which an organism uses food to support its life.
Human nutrition deals with the provision of essential nutrients in food that are necessary to support human life and good health.
In nutrition, diet is the sum of food consumed by a person or other organism.