Medical Dictionary


noun \ˈrüt, ˈrt\

Medical Definition of ROOT

a :  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 leaves b :  any subterranean plant part (as a true root or a bulb, tuber, rootstock, or other modified stem) especially when fleshy and edible
a (1) :  the part of a tooth within the socket (2) :  any of the processes into which the root of a tooth is often divided b :  the enlarged basal part of a hair within the skin—called also hair root c :  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 root d :  the part of an organ or physical structure by which it is attached to the body <the root of the tongue>
root·less \-ləs\ adjective

Illustration of ROOT

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