perchloric acid

from WordNet (r) 3.0 (2006)

perchloric acid
    n 1: a powerful oxidizing agent; forms perchlorates

from The Collaborative International Dictionary of English v.0.48

Oxychloric \Ox`y*chlo"ric\, a. [Oxy
   (a) + chloric.] (Chem.)
   (a) Of, pertaining to, or designating in general, certain
       compounds containing oxygen and chlorine.
   (b) Formerly designating an acid now called {perchloric
       acid}. See {Perchloric}.
       [1913 Webster]