The term midline refers to a central axis or plane that divides something into two equal parts. In anatomy, it is used to describe structures that are located along the vertical center line of the body, such as the umbilical cord in utero and the vertebral column after birth. The midline can also refer to a mental state of being balanced or centered, with emotions and thoughts not veering too far towards extremes. In a broader sense, it refers to any line that separates two opposing sides or forces, such as in politics where the term "middle ground" is used to describe moderate views that are neither too conservative nor too liberal.