| 释义 |
pedion Cryst.|ˈpɛdɪɒn|
Pl. pedia.
[a. Gr. πεδίον a plain, a flat surface.]
A term introduced to denote any face of an anorthic crystal; each face being bounded by a set of faces of which no two are necessarily parallel, and which are connected only by a law of rational indices.
1899W. J. Lewis Crystallogr. xi. 148 Each form consists of a single face, and will be called a pedion. |