‖n. [ NL., fr. Gr. &unr_; interchange, change, fr. &unr_; to interchange. ] (Rhet.) A figure by which arguments are placed in various points of view, and then turned to one point. Smart. [ 1913 Webster ]

n. [ Gr. &unr_; 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. [ 1913 Webster ]

a. [ Gr. &unr_; crossing. ] Meeting and intersecting, as lines; not parallel; -- opposed to parallel. [ Obs. ] Ash. [ 1913 Webster ]

n. (Chem.) A volatile, pungent, liquid hydrocarbon, C6H10, consisting of two allyl radicals. [ 1913 Webster ]