median

noun4

1. •
   A number separating the higher half from the lower half of a data sample, population, or probability distribution. The median of a finite list of numbers can be found by arranging all the observations from lowest value to highest value and picking the middle one (e.g., the median of {3, 3, 5, 9, 11} is 5). If there is an even number of observations, then there is no single middle value; the median is then usually defined to be the mean of the two middle values.
2. •
   (US) The area separating two lanes of opposite-direction traffic.

   • Seen from street level, the median was clean most days. From the third floor you peered over the benches and trees and saw the trash crowding the subway ventilation grates and paving stones. — 2019
3. •
   A line segment joining the vertex of triangle to the midpoint of the opposing side.
4. •
   (no longer used) A central vein or nerve, especially the median vein or median nerve running through the forearm and arm.

   • Why is not our jugular or throat-veine as much at our command as the mediane [translating mediane]? — 1603

adjective3

1. •
   Situated in a middle, central, or intermediate part, section, or range of (something).
2. •
   Having the median as its value.
3. •
   In the middle of an organ, structure etc.; towards the median plane of an organ or limb.

adjective2

1. •
   Relating to Media or Medes.
2. •
   (no longer used) Of laws, rules etc.: unchanging, invariable.

   • ‘This proceeding,’ interposed the president, ‘is by no means in accordance with the terms of the mulct or sentence, which is in its nature Median, and not to be altered or recalled.’ — 1835

noun1

1. •
   A Mede.