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 Triceps

Medically reviewed by Min Clinic Staff | Updated: January 2026

Triceps: The muscle that extends (straightens) the forearm. The triceps can be felt as the tense muscle in the back of the upper arm while one is doing push-ups. The triceps has three heads, or origins. Its full name is the triceps brachii.