Being in the centre.
Having or containing the centre of something.
Exerting its action towards the peripheral organs.
Being very important, or key to something.
centre
Being in the middle of the way or distance; middle.
Halfway; equidistant from either end point; in the middle between two points
The middle; the midst.
The part of a fair or circus where rides, entertainments, and booths are concentrated.
The widest aisle in the middle of an industrial complex (such as railroad shops or a coach yard) along which various buildings are aligned
A middle way or manner; a mean or middle course between extremes.