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ROOT. That part of a tree or plant under ground from which it draws most of its nourishment from the earth.
     2. When the roots of a tree planted in one man's land extend into that of another, this circumstance does not give the latter any right to the tree, though such is the doctrine of the civil law; Dig. 41, 1, 7, 13; but such person has a right to cut off the roots up to his line. Rolle's R. 394, vide Tree.
     3. In a figurative sense, the term root is used to signify the person from whom one or more others are descended. Vide Descent; Per stirpes.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Surgeons can implant motor roots at the area from which they are torn, and they will usually successfully reconnect, as motor neurons can regrow out of the spinal cord and into the motor root.
Proper preoperative and intraoperative neurophysiologic monitoring should be considered in order to identify those rare cases of schwannomas originating from a functionally active nerve root; when possible, cutting a motor root should be avoided in order to preserve the patient's quality of life.
At this point, the axons join to form the motor root. The sensory root (nervus intermedius) consists of central processes of neurons located in the geniculate ganglion and axons of parasympathetic neurons from the superior salivatory nucleus.
The larger sensory component arises from the ventrolateral aspect of the pons; the much smaller motor root emerges medially (Netter, 1995).