| 单词 | crown lens |
| 释义 | crown lens in British Englishnoun a lens made of optical crown, esp the optical-crown part of a compound achromatic lens crown lens in American English a lens made of crown glass; specif., the convex member of an achromatic lens crown lens in American Englishnoun Optics a lens made of crown glass, usually used as the converging lens component of an achromatic lens Word origin [1825–35]This word is first recorded in the period 1825–35. Other words that entered Englishat around the same time include: archaic, breakdown, cliché, spiritualism, structural |
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