Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Asthenic
Medically reviewed by Min Clinic Staff | Updated: January 2026
Asthenic: 1. Weak. Lacking in strength.
2. Having a slender light body. Ectomorphic.
See also: Lambert-Eaton myasthenic syndrome .