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Pronunciation: rut


  1. The primary or beginning portion of any part, as of a nerve at its origin from the brainstem or spinal cord.
  2. The descending underground portion of a plant; it absorbs water and nutrients, provides support, and stores nutrients.
  3. Loosely used to denote the etiology of a process, event, or conflict requiring solutions to allow mitigation. For roots of pharmacologic significance that are not listed below, see specific names.

Synonym(s): root of tooth

Synonym(s): radix1

[A.S. rot]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.