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Cell Biology. the appendage of the neuron that transmits impulses away from the cell body.
Historical Examples

This tiny protoplasmic thread, the axon, was formed originally by growing out from the cell body.
Physiology Ernest G. Martin

Mr. axon says it is current in Lancashire and in Cornwall, Antiquary, xi.
Folklore as an Historical Science George Laurence Gomme

The contact of the axon of one neuron with the dendrons of another is called a synapse.
Psychotherapy James J. Walsh

Most nerve cells have two kinds of branches, called the axon and the dendrites.
Psychology Robert S. Woodworth

Louis shot away into the outer office, where axon was just putting on his hat to go to the bank.
The Price of Love Arnold Bennett

One of these processes, the axon, is much longer than the others and ends in a muscle or organ of sensation.
A Civic Biology George William Hunter

We saw a moment ago that every axon is inclosed in a sheath.
Physiology Ernest G. Martin

The axon forms the pathway over which nervous impulses travel to and from the nerve centers.
A Civic Biology George William Hunter

Sandy-haired men have no age until they are fifty-five, and axon was not fifty-five.
The Price of Love Arnold Bennett

It presupposes an active interposition of the glia cells between the axon of one neuron and the dendrons of another.
Psychotherapy James J. Walsh

noun
the long threadlike extension of a nerve cell that conducts nerve impulses from the cell body Compare dendrite
n.

“axis of the vertebrate body,” 1842, from Greek axon “axis” (see axis).

axon ax·on (āk’sŏn’) or ax·one (-sōn’)
n.
The usually long process of a nerve fiber that generally conducts impulses away from the body of the nerve cell.
ax’on·al (āk’sə-nəl, āk-sŏn’əl) adj.
axon
(āk’sŏn’)
The long portion of a neuron that conducts impulses away from the body of the cell. Also called nerve fiber.

The part of a nerve cell or neuron that transfers a nerve impulse from the nerve cell body to a synapse with another cell. (See action potential.) Depending on the location of the cell, the length of an axon can vary widely. In some cases (such as the axons that form the spinal cord), they may be several feet long.