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unmyelinated

[uhn-mahy-uh-luh-ney-tid]

adjective

Anatomy.
  1. pertaining to nerve fibers that are not covered with a myelin sheath.



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Word History and Origins

Origin of unmyelinated1

First recorded in 1915–20; un- 1 + myelinated
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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

C fibre These unmyelinated nerve fibres are found only in hairy skin.

Read more on Nature

Myelin is often likened to the plastic coating around electrical wires—it insulates the neural circuits, making them about a hundred times faster than unmyelinated circuits.

Read more on Literature

On campuses, which are notoriously precarious and unmyelinated ecosystems, victimization can be as real as the predations of the high-school locker room.

Read more on The New Yorker

The auditory nerve contains myelinated fibers, which are used to perceive loudness and to process speech, as well as unmyelinated ones.

Read more on New York Times

This fatty white substance insulates axons with a myelin sheath, speeding up the transmission of electrical impulses by a factor of up to at least 50, compared to unmyelinated axons.

Read more on Scientific American

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