**Me"di*an** (?), a. [L. *medianus*, fr. *medius* middle. See Medial.]

**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.

© Webster 1913.

**Me"di*an**, n. Geom.

A median line or point.

© Webster 1913.