median
Pronunciation: /ˈmiːdɪən/
adjective
- 1denoting or relating to a value or quantity lying at the midpoint of a frequency distribution of observed values or quantities, such that there is an equal probability of falling above or below it: the median duration of this treatment was four months
- denoting the middle term (or mean of the middle two terms) of a series arranged in order of magnitude.
noun

Origin:
late Middle English (denoting a median vein or nerve): from medieval Latin medianus, from medius 'mid'