The Collaborative International Dictionary of English v.0.48:

Technicality \Tech`ni*cal"i*ty\, n.; pl. Technicalities.
   1. The quality or state of being technical; technicalness.
      [1913 Webster]

   2. That which is technical, or peculiar to any trade,
      profession, sect, or the like.
      [1913 Webster]

            The technicalities of the sect.       --Palfrey.
      [1913 Webster]

WordNet (r) 3.0 (2006):

technicality
    n 1: a detail that is considered insignificant [syn:
         technicality, trifle, triviality]

The Devil's Dictionary (1881-1906):

TECHNICALITY, n.  In an English court a man named Home was tried for
slander in having accused his neighbor of murder.  His exact words
were:  "Sir Thomas Holt hath taken a cleaver and stricken his cook
upon the head, so that one side of the head fell upon one shoulder and
the other side upon the other shoulder."  The defendant was acquitted
by instruction of the court, the learned judges holding that the words
did not charge murder, for they did not affirm the death of the cook,
that being only an inference.