Lateral ( Barclay, 1803 ) : Away from the median plane (Henle, 1855) of the body, in the frontal plane (Henle, 1855); the opposite of medial (Schulze, 1893). Use of the term seems to go at least as far back as the second century and Galen (see, for example, translation by May, 1968, p. 701), but its formal use was introduced by Barclay (1803, pp. 121, 163), who paired it with mesial. Also see Brusca & Brusca (1990, Fig. 4-A).