| 单词 | achromat |
| 释义 | Word Frequency achromat(ˈækrəˌmæt) noun 1. Also called: achromatic lens a lens designed to bring light of two chosen wavelengths to the same focal point, thus reducing chromatic aberration Compare apochromat 2. a person who has no colour vision at all and can distinguish only black, white, and grey. The condition is very rare |
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