1. a muscle that straightens or extends a limb or joint
Usage: anatomy; commonly used in medical and fitness contexts

Examples

• The extensor muscles in your forearm help you straighten your wrist.
• Strengthening your leg extensors is important for running and jumping.
• The extensor carpi radialis is one of the muscles in the forearm.
• Injury to the extensor tendon can limit your ability to straighten your fingers.
• Physical therapists often focus on balancing flexor and extensor strength.