单词 digonal 释义 digonal, a. Cryst.|dgnl, dagnl|[f. di-2 + Gr. angle + -al.]Denoting an axis of two-fold symmetry.1890G. H. Williams Elem. Crystallogr. (ed. 2) iii. 47 Two other sets of axes are of use in the isometric system. One is the set of interse...