What is the name of the large, rounded projection that can be felt on the superior lateral surface of the shoulder?

The acromion is the correct answer as it is the prominent, bony structure located on the lateral aspect of the shoulder. Specifically, the acromion serves as an extension of the scapula and forms the highest point of the shoulder. This projection is easily palpable, making it a key landmark for both anatomical reference and clinical assessments related to shoulder injuries or conditions.

Understanding the acromion's role is important in the context of shoulder stability and function, as it articulates with the clavicle at the acromioclavicular joint, contributing to the overall mobility of the shoulder girdle. Additionally, it serves as a point of attachment for several muscles and ligaments, playing a critical role in shoulder mechanics.

In contrast, the clavicle is a long bone that connects the arm to the body but is not specifically a rounded projection at the shoulder. The coracoid process is also a hook-like structure on the scapula but is located more anteriorly and is not as prominent or rounded as the acromion. The greater tubercle is a bony prominence on the humerus, serving as an attachment site for muscles, but it is not located on the surface of the shoulder itself.