medial segment

me·di·al seg·'ment

[TA] a delimited part or section of an organ or other structure that lies closest to the midline compared with the other similar parts or sections. See: medial bronchopulmonary segment S V, medial basal bronchopulmonary segment S VII, (left) medial hepatic segment [IV] [IV], (right) posterior medial hepatic segment [VIII] [VIII], (right) anterior medial hepatic segment [V] [V]. Synonym(s): segmentum mediale [TA]