(anatomy) A sagittal plane passing 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: Latin, mediānus, in the middle.
Synonym: midsagittal plane.
Compare: parasagittal plane, sagittal plane.