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piñata
Pinatubo, Mount
pinball
pince-nez
pincer
pincer movement
pinch
pinch bar
pinch effect
pinch grip
pinch hit
pinch-hit
pinch-run
pinch runner
pinchbeck
pinchpenny
pinchpoint
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pinch effect
pinch ef·fect


noun 
Definition:
 
narrowing of charged-particle beam: the narrowing of a beam of charged particles caused by the interaction of each particle with the magnetic field generated by the movement of the beam
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