[W/K] :: Wrist drop

  Wrist \Wrist\, n. [OE. wriste, wrist, AS. wrist; akin to OFries.
     wriust, LG. wrist, G. rist wrist, instep, Icel. rist instep,
     Dan. & Sw. vrist, and perhaps to E. writhe.]
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     1. (Anat.) The joint, or the region of the joint, between the
        hand and the arm; the carpus. See Carpus.
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              He took me by the wrist, and held me hard. --Shak.
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     2. (Mach.) A stud or pin which forms a journal; -- also
        called wrist pin.
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     Bridle wrist, the wrist of the left hand, in which a
        horseman holds the bridle.
  
     Wrist clonus. [NL. clonus, fr. Gr. ?. See Clonic.] (Med.)
        A series of quickly alternating movements of flexion and
        extension of the wrist, produced in some cases of nervous
        disease by suddenly bending the hand back upon the
        forearm.
  
     Wrist drop (Med.), paralysis of the extensor muscles of the
        hand, affecting the hand so that when an attempt is made
        to hold it out in line with the forearm with the palm
        down, the hand drops. It is chiefly due to plumbism.
        Called also hand drop.
  
     Wrist plate (Steam Engine), a swinging plate bearing two or
        more wrists, for operating the valves.
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