Definition of Asthenia
Asthenia: Weakness. Lack of energy and strength. Loss of strength. Myasthenia refers to a loss of muscle strength, as in myasthenia gravis.
Asthenia is from the Greek asthenes, from a- (without) + sthenos (strength).
Last Editorial Review: 9/20/2012
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?
Get the latest health and medical information delivered direct to your inbox FREE!