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Medical Dictionary

essential

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adjective es·sen·tial \i-ˈsen-chəl\

Medical Definition of essential

  1. 1:  being, relating to, or containing an essence <an essential odor>

  2. 2:  being a substance that is not synthesized by the body in a quantity sufficient for normal health and growth and that must be obtained from the diet <The body converts linoleic acid—an essential fatty acid that makes up 60 percent of corn oil—into arachidonic acid.—Janet Raloff, Science News, 24 June 1989>—see essential amino acid; compare nonessential

  3. 3:  having no obvious or known cause :  idiopathic <essential disease>





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