a.

1. 中間的，中央的[B]
   the median family income

   中等家庭的收入

n.[C]

1. 【統】中位數
2. 【數】中線，中點
3. 【美】（高速公路的）中間安全島

adj.

1. technical, chiefly Anatomy  situated in the middle, especially of the body.
2. denoting or relating to a value or quantity lying at the mid point of a frequency distribution of observed values or quantities.
   ▸denoting the middle term (or mean of the middle two terms) of a series arranged in order of magnitude.

n.

1. a median value.
2. (also median strip) North American term for central reservation.
3. Geometry  a straight line drawn from any vertex of a triangle to the middle of the opposite side.