/ ˈmiːdiən; NAmE / adjective , noun
■ adjective [ only before noun ] ( technical )
1.
having a value in the middle of a series of values :
the median age / price
2.
located in or passing through the middle :
a median point / line
■ noun
1.
( mathematics ) the middle value of a series of numbers arranged in order of size
2.
( geometry ) a straight line passing from a point of a triangle to the centre of the opposite side.
3.
(also ˈmedian strip ) (both NAmE ) = central reservation
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WORD ORIGIN
late Middle English (denoting a median vein or nerve): from medieval Latin medianus , from medius mid.