👉 The term "semipectoral" is a medical term used to describe the position of the breastbone, also known as the "pelvis," in relation to the axilla. This position is often described as being slightly lower than the axilla and slightly above it. In terms of anatomy, the pelvis is the center of rotation for the body, with the pelvic bones (the ilium, pubic symphysis, sacrum, and coccyx) and the breastbone (