1. 
[syn: pyrotechnic, pyrotechnical]
The Collaborative International Dictionary of English v.0.48:
Pyrotechnic \Pyr`o*tech"nic\, Pyrotechnical \Pyr`o*tech"nic*al\,
   a. [Pyro- + technic, technical: cf. F. pyrotechnique. See
   Fire, Technical.]
   Of or pertaining to fireworks, or the art of forming them.
   [1913 Webster]
   Pyrotechnical sponge. See under Sponge.
      [1913 Webster]
WordNet (r) 3.0 (2006):
pyrotechnical
    adj 1: of or relating to the craft of making fireworks;
           "pyrotechnic smokes" [syn: pyrotechnic,
           pyrotechnical]