central
mesial
normal
amidships
average
balance
banal
center
centermost
common
core
diameter
diaphragm
equator
equatorial
equidistant
generality
golden mean
halfway
happy medium
heart
intercurrent
interior
interjacent
intermediary
intermediate
intervenient
intervening
juste-milieu
kernel
mean
medial
mediocre
mediocrity
mediterranean
medium
mesne
mezzo
mid
middle
middle course
middle ground
middle point
middle position
middle state
middle-of-the-road
middlemost
middling
midland
midmost
norm
median strip
mediate
mediation
mediator
5-year
Armenian
Babylonian
Burgundian
Macedonian
Moorish
approximate
comparable
cumulative
imperial
long-term
longitudinal
minimum
moderate
monthly
nominal
optimum
successive
comedian