[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.
- Essential nutrient
noun any substance that must be obtained from the diet because the body cannot make it in sufficient quantity to meet its needs Examples Dietary Protein: An Essential Nutrient For Bone Health.
[ih-sof-uh-guh s, ee-sof-] /ɪˈsɒf ə gəs, iˈsɒf-/ noun, plural esophagi [ih-sof-uh-jahy, gahy, ee-sof-] /ɪˈsɒf əˌdʒaɪ, ˌgaɪ, iˈsɒf-/ (Show IPA). Anatomy, Zoology. 1. a muscular passage connecting the mouth or pharynx with the stomach in invertebrate and vertebrate animals; gullet. /iːˈsɒfəɡəs/ noun (pl) -gi (-ˌdʒaɪ), -guses 1. the US spelling of oesophagus n. late 14c., from […]
esophagotomy e·soph·a·got·o·my (ĭ-sŏf’ə-gŏt’ə-mē) n. An incision through the wall of the esophagus.
esophagostomy e·soph·a·gos·to·my (ĭ-sŏf’ə-gŏs’tə-mē) n. The surgical formation of an opening directly into the esophagus from without.