# triceps

/ˈtɹaɪˌsɛps/ (US) · /tɹˈaɪsɛps/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/triceps
Updated: 2026-10-18

## Definition

the large muscle on the back of your upper arm that straightens your elbow when you push something.

For teachers: the large three-headed muscle running along the back of the upper arm from shoulder to elbow, responsible for extending the elbow joint. Works in opposition to the biceps during pushing movements.

## Examples

- Push-ups make your triceps burn.
- The coach shows the athletes how to stretch their triceps after lifting weights.
- Years of competitive swimming developed her triceps into powerful drivers of each stroke, giving her a clear advantage in the final lap.

## Usage notes

- Singular and plural are both 'triceps'; verb agreement follows singular or plural sense.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.