principal section
Crystallography
noun
The cross-section of a crystal containing its optic axis and the direction of a given ray of light.
Origin
Early 19th century; earliest use found in John Herschel (1792–1871), mathematician and astronomer.
| 单词 | principal section |
| 释义 | principal sectionCrystallography noun The cross-section of a crystal containing its optic axis and the direction of a given ray of light. Origin |
| 随便看 |
英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。