pencil arm
noun
The arm of a device, especially a pair of compasses, that holds a pencil for marking, recording measurements, etc.
Origin
Late 19th century; earliest use found in Science.
| 单词 | pencil arm |
| 释义 | pencil armnoun The arm of a device, especially a pair of compasses, that holds a pencil for marking, recording measurements, etc. Origin |
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