Dictionary.com
Thesaurus.com

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.

See Examples For:

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

The cause was Parkinson’s disease and myasthenia gravis, said a daughter, Daniella Yitzchak.

From Washington Post Apr. 17, 2020

Esophageal paralysis is not uncommon in myasthenia gravis.

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

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training