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单词 pith ball
释义

Definition of pith ball in English:

pith ball

noun
  • A small ball of pith (usually from a tree), especially one hanging from a thread in an electroscope, which is attracted or repelled by an electrostatically charged object.

Origin

Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London.

 
 

Definition of pith ball in US English:

pith ball

noun
  • A small ball of pith (usually from a tree), especially one hanging from a thread in an electroscope, which is attracted or repelled by an electrostatically charged object.

Origin

Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London.

 
 
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更新时间:2024/9/21 12:30:59