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myasthenia

American  
[mahy-uhs-thee-nee-uh] / ˌmaɪ əsˈθi ni ə /

noun

Pathology.
  1. muscle weakness.


myasthenia British  
/ ˌmaɪəsˈθɛnɪk, ˌmaɪəsˈθiːnɪə /

noun

  1. any muscular weakness

  2. short for myasthenia gravis

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of myasthenia

First recorded in 1855–60; my- + asthenia

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Nine-time Grand Slam champion Monica Seles has revealed she was diagnosed with myasthenia gravis - a neuromuscular autoimmune disease - three years ago.

From BBC • Aug. 13, 2025

His longtime partner, Keely Stahl, said the cause was myasthenia gravis, an autoimmune neuromuscular disease that weakens the skeletal muscles.

From New York Times • Jan. 27, 2023

In patients with the autoimmune disease myasthenia gravis, muscle cell receptors that induce contraction in response to acetylcholine are targeted by antibodies.

From Textbooks • Jun. 9, 2022

Rodrigo Duterte, the controversial president of the Philippines, has revealed he is suffering from the autoimmune disease myasthenia gravis, a condition that could cause serious health complications for the 74-year-old leader.

From The Guardian • Oct. 7, 2019

Esophageal paralysis is not uncommon in myasthenia gravis.

From Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery by Jackson, Chevalier

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