flexor

/ˈflɛksər/
noun
  1. A muscle that bends a joint, such as the elbow or knee, by bringing two body parts closer together.
    • Stretching the hip flexors can help prevent lower back pain.
    • When you curl your fingers into a fist, your finger flexors are working.
    • The biceps is a major flexor that bends the arm at the elbow.
Antonyms
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