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• n  a joint of a finger when the fist is closed
• v  press or rub with the knuckles
• v  shoot a marble while keeping one's knuckles on the ground

• Michelle and Barack Obama knocked knuckles as he took the stage to claim the Democratic presidential nomination, bringing new attention to the high-five's celebratory successor.
• As schoolboys and a good many annoyed mothers and teachers are aware, knuckle joints can be made to crack.
• The fight between Louis Wolfson and Sewell Avery for control of Montgomery Ward reached the bare-knuckle stage last week.

• knuckle joint
• metacarpophalangeal joint

News & Articles

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• Fowler out due to bruised knuckle following HBP
  The Rockies didn't start center fielder Dexter Fowler against the Phillies on Friday night because of a bruised right ring knuckle that he injured Thursday when he was hit by a pitch against the Nationals.
  June 15, 2013 - Colorado Rockies
• THE CAT'S MEOW: Congressman Mike Fitzpatrick earns Legislative Leader Award from the Humane Society of the U.S.
  WASHINGTON, D.C. - You don’t have to have political clout to get the attention of a congressmen. You could be a creature with four legs and fur or two legs and feathers. You could quack, bark or even be a knuckle dragger. If you’re in danger or mistreated, Congressman Mike Fitzpatrick is your man, and his dedication to the protection of animals has earned him the gratitude and the special ...
  June 14, 2013 - Bristol Pilot
• X-rays negative on Fowler's hand, day to day
  Rockies center fielder and leadoff hitter Dexter Fowler left Thursday's game against the Nationals before the top of the fifth inning. He was hit on the right knuckle on his ring finger by a Ross Detwiler pich in the third. X-rays were negative and he is listed day to day.
  June 13, 2013 - Major League Baseball

Quotes

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• Morgan Tsvangirai in Bloomberg
  This is also the time for firm diplomacy,Tsvangirai wrote. "Major powers here, such as South Africa, the US and Britain must act to remove the white-knuckle grip of Mugabe's suicidal reign and oblige him and his minions to retire."
• Lewis Hamilton in Toronto Star
  I think for me one of the most, if not the most, difficult races I had to do,Hamilton said. "It is a big boost in terms of confidence and my drive to be world champion." "There are two races to go. I need to knuckle down, and I...
• Joey Barton in International Herald Tribune
  I am not blaming Lee Cattermole in any way for this injury,Barton said. "It was a 50-50 ball and we both went for it, and these things happen. Obviously, it's disappointing and frustrating, and my sole intention is to knuckle down and...