Webster’s Revised Unabridged Dictionary · 1913
Diallage
Di·al′la·ge, n. [NL., fr. Gr. διαλλαγή interchange, change, fr. διαλλάσσειν to interchange.] (Rhet.) A figure by which arguments are placed in various points of view, and then turned to one point. Smart.
Di′al·lage, n. [Gr. διαλλαγή change, alluding to the change and inequality of luster between the natural joints of the mineral.] (Min.) A dark green or bronze-colored laminated variety of pyroxene, common in certain igneous rocks.