The rhomboid minor muscle is a flat, triangular muscle located in the upper back. It aids in scapular retraction and rotation, and is commonly used in exercises such as rows and pull-ups. Some synonyms for this muscle include the lesser rhomboid muscle, rhomboid minor, and rhomboideus minor. Despite these variations, they all refer to the same muscle group. It is important to understand the different names for this muscle in order to effectively target and strengthen it during workouts. Injuries to the rhomboid minor muscle can cause pain and discomfort, so taking proper precautions and engaging in proper warm-up exercises is important.