English Dictionary

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knuckleball (ˈnʌkəlˌbɔːl) 

Definitions

noun

  1. a throw in baseball that flies in an erratic way and is difficult to hit well because the pitcher holds the ball between the fingertips or knuckles   ⇒ Everyone who has ever picked up a baseball has tried to throw a knuckleball, but only a few stick with it.

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