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ratchet
(redirected from ratchets down)

   Also found in: Dictionary/thesaurus, Encyclopedia 0.02 sec.
ratchet
a steplocking device on surgical instruments. As the handles are closed the jaws are also closed and the ratchet holds them in a locked position. The ratchet consists of a notched bar on each handle, the notches facing and overriding when the handles are closed.


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And that 5% savings rate is only for the first year--it ratchets down in years two and three.
The enzyme can spin a long filament because it ratchets down the rotation rate when it carries a heavy load, he explains, suggesting that F1-ATPase can change gears-as a good motor should.
 
 
 
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