nerve cord

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noun

a single hollow tract of nervous tissue that constitutes the central nervous system of chordates and develops into the spinal cord and brain in vertebrates.

a solid double strand of nerve fibers along the length of the body in elongate invertebrates, as earthworms and insects, connecting with a pair of nerve ganglia at each body segment.

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Origin of nerve cord

First recorded in 1875–80

Words nearby nerve cord

nerve, nerve block, nerve cell, nerve center, nerve centre, nerve cord, nerve fiber, nerve fibre, nerve gas, nerve growth factor, nerve impulse

How to use nerve cord in a sentence

In specimens with the proboscis drawn in, the nerve cord is of course doubled back on itself.
Journal of Entomology and Zoology, March 1917|Various
Earlier than that, in 1839, Nasse had discovered that a severed nerve cord degenerates in its peripheral portions.
A History of Science, Volume 4(of 5)|Henry Smith Williams
But Helmholtz readily demonstrated the contrary, showing that the nerve cord is a relatively sluggish message-bearer.
A History of Science, Volume 4(of 5)|Henry Smith Williams
Some became greatly elongated, and had developed so that the thread surrounded the dorsal nerve-cord.
The Biological Problem of To-day|Oscar Hertwig

The notochord is enclosed in a thick sheath of connective tissue continuous with a thinner sheath round the nerve cord.
The Vertebrate Skeleton|Sidney H. Reynolds