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axon

noun

ax·​on ˈak-ˌsän How to pronounce axon (audio)
variants or less commonly axone
: a usually long and single nerve-cell process that usually conducts impulses away from the cell body see neuron illustration

Examples of axon in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This protein is known to help guide axons – long extensions that neurons use to send information to each other – to their targets during development. Ashley Brandebura, The Conversation, 11 Nov. 2025 The researchers looked specifically at where gray matter (the body of a neuron) intersects with white matter (the long axons that project out of the cell body) — an area thought to be particularly vulnerable to head impacts. The New York Times News Service Syndicate, San Diego Union-Tribune, 14 Oct. 2025 And in the brain’s white-matter wiring, visceral fat again stood out, with diffusion MRI scans revealing lower axon density and more tissue disorganization – tiny areas of wear-and-tear that can interrupt signaling. New Atlas, 28 Sep. 2025 In the remaining five mice, the researchers tested a method using viruses to measure the full length of nerve projections known as axons. Nora Bradford, Scientific American, 27 Aug. 2025 See All Example Sentences for axon

Word History

Etymology

New Latin axon, from Greek axōn

First Known Use

1895, in the meaning defined above

Time Traveler
The first known use of axon was in 1895

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Cite this Entry

“Axon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/axon. Accessed 29 Nov. 2025.

Kids Definition

axon

noun
ax·​on ˈak-ˌsän How to pronounce axon (audio)
variants also axone
: a usually long and single process of a neuron that usually carries impulses away from the cell body compare dendrite sense 2
axonal
ˈak-sən-ᵊl How to pronounce axon (audio)
ak-ˈsän-
-ˈsōn-
adjective

Medical Definition

axon

noun
ax·​on ˈak-ˌsän How to pronounce axon (audio)
variants also axone
: a usually long and single nerve-cell process that usually conducts impulses away from the cell body

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