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请输入您要查询的英文单词：

　

单词 proof plane
释义

Definition of proof plane in English:

proof plane

noun

  • 1Electricity a small flat conductor with an insulating handle that is used to measure the electrical charge of a body by picking up the charge when placed in contact with the body and transferring it to a measuring instrument.

  • 2An object with an optically flat surface; a surface for use as a standard of flatness.

Origin

Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London.

 
 

Definition of proof plane in US English:

proof plane

noun

  • 1Electricity a small flat conductor with an insulating handle that is used to measure the electrical charge of a body by picking up the charge when placed in contact with the body and transferring it to a measuring instrument.

  • 2An object with an optically flat surface; a surface for use as a standard of flatness.

Origin

Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London.

 
 
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更新时间：2026/6/5 7:06:59