ADJ (of a crystal) having one quarter of the number of faces necessary for the full symmetry of its crystal system (指结晶)四分面体的
tetartohedral form四分半面形
trigonal tetartohedral三方四分面体
cubic tetartohedral等轴四半面体
rhombohedral tetartohedral class菱形四分面像类
hexagonal rhobohedral tetartohedral class六方菱形四分面体类
trigonal tetartohedral class三方四分面像晶族
hexagonal tetartohedral class六方四半面体类
tetragonal tetartohedral class正方四分半面体;正方四分面晶族
tetartohedral pentagonal dodecahedron偏五角十二面体
ADJ（形容词） (of a crystal) having one quarter of the number of faces necessary for the full symmetry of its crystal system (指结晶)四分面体的