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Medical Dictionary

noun \ˈrüt, ˈru̇t\

Medical Definition of root

  1. 1a:  the usually underground part of a seed plant body that functions as an organ of absorption, aeration, and food storage or as a means of anchorage and support and that differs from a stem especially in lacking nodes, buds, and leavesb:  any subterranean plant part (as a true root or a bulb, tuber, rootstock, or other modified stem) especially when fleshy and edible

  2. 2a:  the part of a tooth within the socket:  any of the processes into which the root of a tooth is often dividedb:  the enlarged basal part of a hair within the skin—called also hair rootc:  the proximal end of a nerve; especially :  one or more bundles of nerve fibers joining the cranial and spinal nerves with their respective nuclei and columns of gray matter—see dorsal root, ventral rootd:  the part of an organ or physical structure by which it is attached to the body <the root of the tongue>

  3. root·less \-ləs\play adjective



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