(a.) Middle; median; in, or in the region of, the mesial plane; internal; -- opposed to lateral.

average betwixt and between central core equatorial equidistant half-and-half halfway in medias res in the mean in the middle interior intermediary intermediate mean medial medially median mediocre mediterranean medium mediumly mesial mezzo mezzo-mezzo mid middle middlemost middling midland midmost midships midway nuclear