myo·​si·​tis ˌmī-ə-ˈsī-təs How to pronounce myositis (audio)
: soreness of voluntary muscle due to inflammation

Example Sentences

Recent Examples on the Web One type, inclusion body myositis, can also cause weakness in hands and feet. Laura Landro, WSJ, 13 Nov. 2022 Krukow has dealt for years with a degenerative muscle disease, inclusion body myositis, that has left him barely able to walk and losing some dexterity in his hands. Bruce Jenkins, San Francisco Chronicle, 1 Apr. 2022 To get Bassoon back to a place where the turtle could care for himself and safely return to the ocean, the National Aquarium took the reptile in for a CT scan, which helped veterinarians diagnose Bassoon with myositis of the jaw muscles. Kelli Bender,, 12 Apr. 2022 Franco Patino first got into biomedical engineering to help his mother, who suffers from inclusion body myositis, a rare condition that weakens damages and muscles. Brenna Ehrlich, Rolling Stone, 7 Nov. 2021 The cause was myositis, a muscle weakening and wasting disease, said a son, Christian Blood. Washington Post, 29 Oct. 2021 Since 2014, when the public learned of the disease (inclusion-body myositis) that so drastically affects Krukow’s ability to walk, Kuiper’s friendship and behind-the-scenes devotion have been invaluable. Bruce Jenkins, San Francisco Chronicle, 8 June 2021 The tumor, known as a thymoma, caused a neuromuscular disorder called myasthenia gravis that attacked the communication between his nerve cells and muscles, as well as inflammation and breakdown of muscle tissue called myositis. S. Wayne Carter Jr.,, 25 May 2021 He was diagnosed in 2017 with inclusion body myositis, a slow-moving degenerative condition that’s causing his muscles to atrophy. Gary Graff, cleveland, 18 Oct. 2020 See More

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

Word History


New Latin, irregular from Greek mys muscle, mouse

First Known Use

circa 1807, in the meaning defined above

Time Traveler
The first known use of myositis was circa 1807

Dictionary Entries Near myositis

Cite this Entry

“Myositis.” Dictionary, Merriam-Webster, Accessed 23 Mar. 2023.

Medical Definition


myo·​si·​tis ˌmī-ə-ˈsīt-əs How to pronounce myositis (audio)
: muscular discomfort or pain from infection or an unknown cause

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