plural biceps also bicepses
: a muscle having two heads: such as
a
or bicep
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
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
Chloe BuschThe biceps brachii, the rounded muscles that are easily identifiable, consists of a long and short head.—Eric Sternlicht
Eric Sternlicht
b
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
Kelyn SoongExamples of biceps in a Sentence
Recent Examples on the Web
Rashawn Slater suffered a season-ending biceps injury in Week 3 and center Corey Linsley was out for three games because of various injuries.
—Joe Reedy, ajc, 17 Jan. 2023
Rashawn Slater went down in Week 3 to a biceps injury, Bosa missed most of the season because of groin injury and wide receivers Keenan Allen and Mike Williams were both in and out of the lineup due to injuries.
—Tyler Dragon, USA TODAY, 15 Jan. 2023
This was also the game in which the Chargers lost edge rusher Joey Bosa (core muscle) and left tackle Rashawn Slater (biceps) to long-term injuries.
—Los Angeles Times, 8 Jan. 2023
Morgan Moses suffered a biceps injury in the fourth quarter of Sunday night’s 16-13 loss to the Pittsburgh Steelers.
—Ryan McFadden, Baltimore Sun, 2 Jan. 2023
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Joe Reedy, ajc, 17 Jan. 2023
Rashawn Slater went down in Week 3 to a biceps injury, Bosa missed most of the season because of groin injury and wide receivers Keenan Allen and Mike Williams were both in and out of the lineup due to injuries.
—Tyler Dragon, USA TODAY, 15 Jan. 2023
This was also the game in which the Chargers lost edge rusher Joey Bosa (core muscle) and left tackle Rashawn Slater (biceps) to long-term injuries.
—Los Angeles Times, 8 Jan. 2023
Morgan Moses suffered a biceps injury in the fourth quarter of Sunday night’s 16-13 loss to the Pittsburgh Steelers.
—Ryan McFadden, Baltimore Sun, 2 Jan. 2023
See All Example Sentences for biceps
Cite this Entry
“Biceps.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biceps. Accessed 4 Nov. 2025.
Copy CitationKids Definition
biceps
noun
bi·ceps
ˈbī-ˌseps 
plural biceps
: a muscle having the end at which it begins divided into two parts
especially
: a large muscle of the front of the upper arm
Medical Definition
biceps
noun
bi·ceps
ˈbī-ˌseps
plural biceps also bicepses
: a muscle having two heads: as
a
or bicep
or biceps brachii
also biceps flexor cubiti
: the large flexor muscle of the front of the upper arm arising by its short head from the coracoid process and by its long head from the upper margin of the glenoid cavity and being inserted into the tuberosity of the radius
b
or biceps femoris
also biceps flexor cruris
: the large flexor muscle of the back of the upper leg that arises by its long head from the tuberosity of the ischium and by its short head from the shaft of the femur, that is inserted into the head of the fibula, its tendon forming the outer hamstring, and that flexes the leg on the thigh and extends the thigh on the trunk
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