Noun: deltoid muscle
- A large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm
"Weightlifters often focus on developing their deltoid muscles for a broader shoulder appearance";
- deltoid, musculus deltoideus, delt [informal]
Derived forms: deltoid muscles
Type of: skeletal muscle, striated muscle
Part of: rotator cuff
Encyclopedia: Deltoid muscle