单词 polytypism 释义 polytypism|pltapz()m|[f. polytypic a. + -ism.]1. [After G. polytypie (H. Baumhauer 1915, in Zeitschr. f. Krist. u. Min. LV. 252).] A kind of polymorphism in which a substance occurs in a number of crystalline modifications (polytypes...