median plane 名詞
 正中矢狀平面,正中面,中央面
 Me·di·an a.
 1. Being in the middle; running through the middle; as, a median groove.
 2. Zool. Situated in the middle; lying in a plane dividing a bilateral animal into right and left halves; -- said of unpaired organs and parts; as, median coverts.
 Median line. (a) Anat. Any line in the mesial plane; specif., either of the lines in which the mesial plane meets the surface of the body. (b) Geom. The line drawn from an angle of a triangle to the middle of the opposite side; any line having the nature of a diameter.
 Median plane Anat., the mesial plane.
 Median point Geom., the point where the three median lines of a triangle mutually intersect.