[uh-sen-shuh l] /əˈsɛn ʃəl/
absolutely necessary; indispensable:
Discipline is essential in an army.
pertaining to or constituting the essence of a thing.
noting or containing an essence of a plant, drug, etc.
being such by its very nature or in the highest sense; natural; spontaneous:
a basic, indispensable, or necessary element; chief point:
Concentrate on essentials rather than details.
vitally important; absolutely necessary
basic; fundamental: the essential feature
completely realized; absolute; perfect: essential beauty
(biochem) (of an amino acid or a fatty acid) necessary for the normal growth of an organism but not synthesized by the organism and therefore required in the diet
derived from or relating to an extract of a plant, drug, etc: an essential oil
(logic) (of a property) guaranteed by the identity of the subject; necessary. Thus, if having the atomic number 79 is an essential property of gold, nothing can be gold unless it has that atomic number
(music) denoting or relating to a note that belongs to the fundamental harmony of a chord or piece
(pathol) (of a disease) having no obvious external cause: essential hypertension
(geology) (of a mineral constituent of a rock) necessary for defining the classification of a rock. Its absence alters the rock’s name and classification
something fundamental or indispensable: a sharp eye is an essential for a printer
(music) an essential note
mid-14c., “that is such by its essence,” from Late Latin essentialis, from essentia (see essence). Meaning “pertaining to essence” is from late 14c., that of “constituting the essence of something” is from 1540s; that of “necessary” is from 1520s. Essentials “indispensable elements” is from early 16c. Related: Essentially.
essential es·sen·tial (ĭ-sěn’shəl)
es·sen’ti·al’i·ty (-shē-āl’ĭ-tē) or es·sen’tial·ness n.
noun, Biochemistry. 1. 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 […]
- 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