See under nerve root.
What is the “seven” in “7 UP?” What is the “root” in “root beer?”
Root beer and 7 Up are carbonated, sweetened beverages with peculiar names. What root is found in root beer? Burdock? Daikon? And what does the “7” represent? Good luck? The primary flavor of root beer was originally made using the root (or bark) of the sassafras plant. Sassafras is native to the Americas and was supposedly discovered by the Spanish in 1528. It is believed …
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Origin of ventral root
First recorded in 1920–25
a nerve fiber bundle that emerges from either side of the spinal cord and joins with a complementary bundle to form each spinal nerve in the series of spinal nerves: the root at the rear of the spinal cord (dorsal root or sensory root) conveys sensations to the central nervous system, and the root at the front (ventral root or motor root) conveys impulses to the muscles.
Origin of nerve root
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The motor root of a spinal nerve.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.