Median /(mē"dĭ*an)/

Me·di·an

Median

a.
  1. Being in the middle; running through the middle; as, a median groove.
  2. 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. (Zool.)

Phrases & Compounds
Median line
Any line in the mesial plane; specif., either of the lines in which the mesial plane meets the surface of the body.
Median plane
the mesial plane.
Median point
the point where the three median lines of a triangle mutually intersect.

Median

n.
  1. A median line or point. (Geom.)