tri·​ceps | \ ˈtrī-ˌseps How to pronounce triceps (audio) \
plural triceps

Definition of triceps

: a muscle that arises from three heads especially : the large extensor muscle along the back of the upper arm

Examples of triceps in a Sentence

He felt a pain in his right triceps.
Recent Examples on the Web But Joyner tore a triceps in the opener and had surgery, ending his season. Dennis Waszak Jr.,, 23 Dec. 2021 This includes your deltoids and rotator cuff muscles (shoulder muscles); pec minor and pec major (chest muscles); lats and rhomboids (back muscles); and biceps and triceps (arms muscles). Christa Sgobba, SELF, 2 May 2022 Good luck finding one person who hasn’t incorporated arguably the most popular triceps exercise going into their arms arsenal. Jeff Tomko, Men's Health, 29 Apr. 2022 After all, those two muscles comprise the bulk of your upper arms (your triceps alone accounts for about two-thirds of them). Men's Health, 16 May 2022 That's like spending an hour at the gym on nothing but your triceps. Sonya Collins, Fortune, 6 May 2022 The dip is a great way to drive strength and muscle development in the chest, shoulders and triceps. Philip Ellis, Men's Health, 2 Mar. 2022 That means a push-up from a chair will still effectively work your chest muscles, shoulders, and triceps, while a plank from a chair will still fire up your entire core. Sara Lindberg, SELF, 10 Jan. 2022 Cobra pose is also good for strengthening your triceps and biceps, Dr. Harding says, since the move involves holding up your torso with a slight bend in your elbow, which activates these arm muscles. Jenny Mccoy, SELF, 7 Mar. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'triceps.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of triceps

1676, in the meaning defined above

History and Etymology for triceps

New Latin tricipit-, triceps, from Latin, three-headed, from tri- + capit-, caput head — more at head

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The first known use of triceps was in 1676

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Last Updated

18 Jun 2022

Cite this Entry

“Triceps.” Dictionary, Merriam-Webster, Accessed 15 Aug. 2022.

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More Definitions for triceps


tri·​ceps | \ ˈtrī-ˌseps How to pronounce triceps (audio) \
plural triceps also tricepses

Medical Definition of triceps

: a muscle that arises from three heads:
a : the large extensor muscle that is situated along the back of the upper arm, arises by the long head from the infraglenoid tubercle of the scapula and by two heads from the shaft of the humerus, is inserted into the olecranon at the elbow, and extends the forearm at the elbow joint

called also triceps brachii

b : the gastrocnemius and soleus muscles viewed as constituting together one muscle

called also triceps surae


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