What term describes the plane that separates the body into right and left portions, not necessarily equal?

The term that describes the plane separating the body into right and left portions, which may not be equal, is indeed the parasagittal plane. This term is defined by its relationship to the midline of the body. While the sagittal plane runs parallel to the midline and divides the body into equal right and left halves, the parasagittal plane is any plane parallel to the sagittal plane but does not necessarily bisect the body into equal parts. This distinction is important in anatomical terminology, as it helps in accurately describing the location of structures or points of reference in the body.

In contrast, the transverse plane (also known as the horizontal or axial plane) divides the body into superior (upper) and inferior (lower) portions. The coronal plane (or frontal plane) separates the body into anterior (front) and posterior (back) portions, while the frontal plane is similar but specifically oriented to describe structures relative to the face and front of the body. Understanding these anatomical planes is crucial for clear communication in medical and anatomical contexts.