plural triceps
: a large muscle along the back of the upper arm
He felt a pain in his right triceps.
—usually pluralThis exercise machine works the triceps.
My triceps are sore.
Cite this Entry
“Triceps.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/triceps. Accessed 21 Jun. 2026.
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