Meaning & use
Deltoid
Last updated
The triangular muscle covering the shoulder joint, responsible for lifting and rotating the arm.
See it in a sentence
He strained his deltoid while lifting the heavy box overhead.
Shoulder presses are a common exercise for building the deltoids.
A note on using this word
Named from the Greek letter delta, because the muscle's triangular shape resembles the letter's outline.
Another way to use it
2. adjective
Shaped like a triangle; triangular.
The leaf has a distinctive deltoid outline.
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