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Freebase(0.00 / 0 votes)Rate this definition: Nutrient. A nutrient is a chemical that an organism needs to live and grow or a substance used in an organism's metabolism which must be taken in from its environment. They are used to build and repair tissues, regulate body processes and are converted to and used as energy.
a nutrient that is involved with all body processes. Makes up the basic part of the blood, helps with waste removal, and cushions the spinal cord and joints. Transports nutrients to all the cells in body and wastes products from cells to the kidneys. Regulates body temp.