muscle spindle

noun

Definition of muscle spindle

: a sensory end organ in a muscle that is sensitive to stretch in the muscle, consists of small striated muscle fibers richly supplied with nerve fibers, and is enclosed in a connective tissue sheath

called also stretch receptor

First Known Use of muscle spindle

1894, in the meaning defined above

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The first known use of muscle spindle was in 1894

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Cite this Entry

“Muscle spindle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/muscle%20spindle. Accessed 15 Aug. 2020.

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More Definitions for muscle spindle

muscle spindle

noun

Medical Definition of muscle spindle

: a sensory end organ in a muscle that is sensitive to stretch in the muscle, consists of small striated muscle fibers richly supplied with nerve fibers, and is enclosed in a connective tissue sheath

called also stretch receptor

More from Merriam-Webster on muscle spindle

Britannica.com: Encyclopedia article about muscle spindle

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