me·di·an /ˈmɪdɪən/ 名詞
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.
Me·di·an, n. Geom. A median line or point.
adj 1: relating to or constituting the middle value of an ordered
set of values (or the average of the middle two in an
even-numbered set); "the median value of 17, 20, and
36 is 20"; "the median income for the year was
$15,000" [syn: median(a), average]
2: dividing an animal into right and left halves [syn: medial]
3: relating to or situated in or extending toward the middle
n : the value below which 50% of the cases fall [syn: median