Musculus Pectoralis Minor, commonly known as the "smaller chest muscle," is a significant muscle that assists in the movement and stability of the shoulder blade. It is important to note that there are no direct synonyms for this term as it is a scientific name used specifically for the muscle anatomy. However, it can be referred to as the minor chest muscle or simply the pectoralis minor. Additionally, other muscles in the chest area, such as the pectoralis major, serratus anterior, and subclavius muscle, are often grouped together with the pectoralis minor due to their proximity and function within the chest and shoulder region.