myositis

noun

myo·​si·​tis ˌmī-ə-ˈsī-təs 

: soreness of voluntary muscle due to inflammation

Examples of myositis in a Sentence

Recent Examples on the Web

The musician shares an update on his battle with the muscle disease inclusion body myositis, which he's been living with since 2019. — Leigh Blickley, Entertainment Weekly, 5 June 2026

Early experiments—many of them headed by Müller’s team—suggest that CAR-T therapies can work against several different autoimmune diseases, including myositis, systemic sclerosis, ulcerative colitis, and myasthenia gravis, with few side effects. — Katherine J. Wu, The Atlantic, 9 Apr. 2026

When the results came back, she was diagnosed with benign acute childhood myositis, a rare disease that typically follows a viral upper respiratory infection, such as the flu, according to the National Institutes of Health (NIH). — Alyce Collins, MSNBC Newsweek, 7 Dec. 2025

One type, inclusion body myositis, can also cause weakness in hands and feet. — Laura Landro, WSJ, 13 Nov. 2022

Word History

Etymology

New Latin, irregular from Greek mys muscle, mouse

First Known Use

circa 1807, in the meaning defined above

Rhymes for myositis

• arthritis
• bronchitis
• bursitis
• detritus
• gastritis
• mastitis
• metritis
• nephritis
• neuritis
• orchitis
• osteitis
• otitis

Medical Definition

myositis

noun

myo·​si·​tis ˌmī-ə-ˈsīt-əs 

: muscular discomfort or pain from infection or an unknown cause