资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.]
   1. (Anat.) The joint, or the region of the joint, between the
      hand and the arm; the carpus. See {Carpus}.

            He took me by the wrist, and held me hard. --Shak.

   2. (Mach.) A stud or pin which forms a journal; -- also
      called {wrist pin}.

   {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.

资料来源 : WordNet®

wrist pin
     n : pin joining a piston to a connecting rod [syn: {gudgeon pin}]