| 单词 | candela |
| 释义 | candela /kan dee"leuh/, n. Optics. a unit of luminous intensity, defined as the luminous intensity of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity of 1/683 watt/steradian: adopted in 1979 as the international standard of luminous intensity. Abbr.: Cd [1945-50; < L: CANDLE] |
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