What is the name of a vertical plane that divides the body into unequal left and right parts?

The vertical plane that divides the body into unequal left and right parts is referred to as the sagittal plane. This plane runs parallel to the midline of the body and allows for movement and orientation along the left and right aspects. The term "sagittal" specifically denotes any plane that separates the body into these uneven parts, as opposed to the median plane, which divides the body into equal left and right halves. The distinction is important in anatomy and medical contexts for describing locations and movements in relation to the body's structure.

In contrast, the median plane strictly bisects the body into equal halves, the coronal plane separates the body into anterior (front) and posterior (back) sections, and the transverse plane divides the body into superior (upper) and inferior (lower) parts, so the sagittal plane is distinct in targeting the left-right differentiation, particularly when the sections are not equal.