(anatomy) A plane passing vertically through the midline, dividing the body into left and right halves of equal proportion (i.e. in the case of bilateral symmetry).
In human body, a median plane is a sagittal plane passing through the midline structures such as the navel and spine.
Word origin: Greek, mesos, Latin, medius, middle+ sagittal.
Synonym: median plane.
Compare: parasagittal plane, sagittal plane.