Source : Webster's Revised Unabridged Dictionary (1913)

Inorganic \In`or*gan"ic\, a. [Pref. in- not + organic: cf. F.
   inorganique.]
   Not organic; without the organs necessary for life; devoid of
   an organized structure; unorganized; lifeness; inanimate; as,
   all chemical compounds are inorganic substances.

   Note: The term inorganic is used to denote any one the large
         series of substances (as minerals, metals, etc.), which
         are not directly connected with vital processes, either
         in origin or nature, and which are broadly and
         relatively contrasted with organic subscances. See
         {Organic}.

   {Inorganic Chemistry}. See under {Chemistry}.

Source : WordNet®

inorganic chemistry
     n : the chemistry of compounds that do not contain hydrocarbon
         radicals