1. having a triangular shape
Usage: technical

1. the large triangular muscle that covers the shoulder joint and is used for lifting the arm
Usage: anatomy

Examples

• The deltoid leaf had three distinct points.
• She felt pain in her deltoid after the workout.
• The deltoid muscle is important for shoulder movement.
• The architect designed a deltoid window for the modern building.
• He injured his deltoid while lifting weights.
• The deltoid shape of the sail caught the wind effectively.