| 单词 | lumen |
| 释义 | lumen n. 1. Physics the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela. Usage Abbr.: lm. 2. Anat. (pl. lumina) a cavity within a tube, cell, etc. Derivatives luminal adj. Etymology: L lumen luminis a light, an opening |
| 随便看 |
英语词典包含43808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。