involuntary muscle

noun

Definition of involuntary muscle 

: muscle governing reflex functions and not under direct voluntary control especially : smooth muscle

Examples of involuntary muscle in a Sentence

Recent Examples on the Web

Leiomyosarcomas, which affect smooth involuntary muscles and are usually found in the abdomen, tend to be more aggressive and have a higher rate of recurrence. Julie Landry Laviolette, miamiherald, "Most of her sarcoma tumors melted away with this clinical trial treatment," 23 May 2018 Manganism, as manganese poisoning is known, causes symptoms similar to Parkinson's disease—involuntary muscle contractions and rigidity. Maya Dukmasova, Chicago Reader, "News / Environment Dangerous levels of heavy metals found at homes near industrial storage facility," 4 May 2018 In people with this disorder, involuntary muscle contractions or uncontrolled movements develop without warning. Sandra G. Boodman, Washington Post, "One day, a serious athlete couldn’t walk straight. Doctors were stumped.," 6 Mar. 2018 In people with this disorder, involuntary muscle contractions or uncontrolled movements develop without warning. Sandra G. Boodman, Washington Post, "One day, a serious athlete couldn’t walk straight. Doctors were stumped.," 6 Mar. 2018 The Staab family have two children who suffer from dystonia, which is a neurological disorder that causes involuntary muscle contractions. Mark Heim, AL.com, "Jim McElwain roasted for taking loss on Florida house, but reason will make you stand up and cheer," 6 Apr. 2018 According to the Times, the Staab's oldest child, Tyler, 20, suffers from a neurological condition called dystonia, which causes involuntary muscle contractions. Jenna West, SI.com, "Ex-Gators Coach Jim McElwain Sold Florida Home at Loss to Help Family With Disabled Kids," 6 Apr. 2018 In people with this disorder, involuntary muscle contractions or uncontrolled movements develop without warning. Sandra G. Boodman, Washington Post, "One day, a serious athlete couldn’t walk straight. Doctors were stumped.," 6 Mar. 2018 In people with this disorder, involuntary muscle contractions or uncontrolled movements develop without warning. Sandra G. Boodman, Washington Post, "One day, a serious athlete couldn’t walk straight. Doctors were stumped.," 6 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'involuntary muscle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of involuntary muscle

1840, in the meaning defined above

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The first known use of involuntary muscle was in 1840

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More Definitions for involuntary muscle

involuntary muscle

noun

Medical Definition of involuntary muscle 

: muscle governing reflex functions and not under direct voluntary control especially : smooth muscle

More from Merriam-Webster on involuntary muscle

Britannica.com: Encyclopedia article about involuntary muscle

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