资料来源 : Webster's Revised Unabridged Dictionary (1913)

Perchromic \Per*chro"mic\, a. [Pref. per- + chromic.] (Chem.)
   Pertaining to, or designating, a certain one of the highly
   oxidized compounds of chromium, which has a deep blue color,
   and is produced by the action of hydrogen peroxide.