device in which many arguments brought upon one point
• (n.) A dark green or bronze-colored laminated variety of pyroxene, common in certain igneous rocks. • (n.) A figure by which arguments are placed in various points of view, and then turned to one point.
Di·al'la·ge noun [ New Latin , from Greek ... interchange, change, from ... 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 noun [ Greek ... 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. 
Establishing a single point with the use of several arguments.
a variety of diopside with a laminated structure, found in gabbro and other igneous rocks.