Which term refers to the imaginary line that divides the body into right and left halves?

The term "midline" refers to the imaginary line that divides the body into equal right and left halves. This concept is fundamental in anatomy and medical terminology, as it helps in describing the location of structures in relation to each other. The midline is an important reference point for understanding the body's organization, especially when discussing the positioning of organs, limbs, and other anatomical features. Establishing this basic division aids in effective communication among medical professionals and contributes to the clarity of anatomical descriptions. Other terms listed pertain to different anatomical directions and relationships within the body but do not define the division into right and left halves.