flexor

noun

1. a skeletal muscle whose contraction bends a joint

   noun.body

   Synonyms flexor muscle

   Antonyms extensor extensor muscle

   Source: WordNet 3.0

2. A muscle which bends or flexes any part; as, the <i>flexors</i> of the arm or the hand; -- opposed to <i>extensor</i>.

   noun

   Source: webster1913