Source : Webster's Revised Unabridged Dictionary (1913)

Self-adjusting \Self`-ad*just"ing\, a. (Mach.)
   Capable of assuming a desired position or condition with
   relation to other parts, under varying circumstances, without
   requiring to be adjusted by hand; -- said of a piece in
   machinery.

   {Self-adjusting bearing} (Shafting), a bearing which is
      supported in such a manner that it may tip to accomodate
      flexure or displacement of the shaft.