An inorganic compound is a chemical compound not containing carbon. However, elemental carbon (diamond or graphite) as well as carbon monoxide, carbon dioxide and carbonates are typically considered inorganic, while methane, ethanol and similar simple hydrocarbons are referred to as organic compounds.
Another key feature that makes a compound organic is the fact that they are found in organisms; e.g., citric acid is an organic compound because the orange produces it.
Types
See also
List of inorganic compounds
Inorganic compounds by element