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 ER

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

ER: 1. Emergency room. 2. Endoplasmic reticulum. 3. Estrogen receptor. 4. Extended release.