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penstock
pent-
pent-up
penta-
pentachlorophenol
pentacle
pentad
pentadactyl
pentaerythritol
pentaerythritol tetranitrate
Pentagon
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pentaprism
pen·ta·prism [ péntə prìzzəm ] (plural pen·ta·prisms)


noun 
Definition:
 
5-sided prism: a prism with five faces that deviates light at a 90º angle, making it useful in correctly presenting an image in the viewfinder of a single-lens reflex camera
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