any amino acid that is required by an animal for growth but that cannot be synthesized by the animal’s cells and must be supplied in the diet.
essential amino acid n.
An alpha-amino acid that is required for protein synthesis but cannot be synthesized by humans and must be obtained in the diet.
- Essential complexity
programming A measure of the “structuredness” of a program. (1996-05-13)
- Essential dysmenorrhea
essential dysmenorrhea n. See primary dysmenorrhea.
- Essential element
noun 1. (biochem) any chemical element required by an organism for healthy growth. It may be required in large amounts (macronutrient) or in very small amounts (trace element) See also macronutrient, trace element
- Essential fatty acid
noun 1. (biochem) any fatty acid required by the body in manufacturing prostaglandins, found in such foods as oily fish and nuts EFA