reflex arc

noun

: the complete nervous path involved in a reflex

Examples of reflex arc 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 brevity reflects the rapidity of the underlying reflex arc. —Scott Travers, Forbes.com, 25 Feb. 2026

Word History

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of reflex arc was in 1882

Rhymes for reflex arc

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Browse Nearby Words

reflex
reflex arc
reflex camera
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Cite this Entry

“Reflex arc.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reflex%20arc. Accessed 9 Mar. 2026.

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Kids Definition

reflex arc

noun
: the complete nervous path involved in a reflex

Medical Definition

reflex arc

noun
: the complete nervous path that is involved in a reflex

More from Merriam-Webster on reflex arc

Britannica.com: Encyclopedia article about reflex arc

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