adjective (a)

• relating or belonging to the class of compounds not having a carbon basis(adj.all)

  Example:
  Hydrochloric and sulfuric acids are called inorganic substances.
  

  Antonym:
  organic
  

  source: wordnet30
• lacking the properties characteristic of living organisms(adj.all)

  source: wordnet30
• Not organic; without the organs necessary for life; devoid of an organized structure; unorganized; lifeness; inanimate; as, all chemical compounds are inorganic substances.(adjective)

  source: webster1913