: a muscle having two heads: such as
or biceps brachii
: the large flexor muscle of the front of the upper arm
Despite a torn left biceps, Holmes used his jab, one of the best in heavyweight history, to win four of the first five rounds.—Jack McCallum … they hold a dumbbell in each hand and do lateral raises with one arm while performing bicep curls with the other.—Chloe Busch The biceps brachii, the rounded muscles that are easily identifiable, consists of a long and short head.—Eric Sternlicht
usually biceps femoris
: the large flexor muscle of the back of the upper leg
Doctors had found a malignant tumor in her right biceps femoris muscle. … She had surgery at the end of February to have the growth and part of her hamstring muscle removed …—Kelyn Soong
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