The Collaborative International Dictionary of English v.0.48:

Spiccato \Spic*ca"to\, a. [It., p. p. of spicare to detach, to
   separate.] (Mus.)
   Detached; separated; -- a term indicating that every note is
   to be performed in a distinct and pointed manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

spiccato
    n 1: bowing in such a way that the bow bounces lightly off the
         strings [syn: spiccato, spiccato bowing]