English Dictionary

Definition of “pithball”

pithball (ˈpɪθˌbɔːl) 

Definitions

noun

  1. (physics, history) (inside an early type of electroscope) a small ball of pith that was suspended on a thread and would indicate the presence and strength of electric charge in an object near or touching it. Pith was used because it is a light, non-conductive material

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