Niger (Noun) — A layer of deeply pigmented grey matter in the midbrain; associated with the striate body; is involved in metabolic disturbances associated with Parkinson's disease and with Huntington's disease.
Niger (Noun) — An African river; flows into the South Atlantic.
Niger (Noun) — A landlocked republic in West Africa; gained independence from France in 1960; most of the country is dominated by the Sahara Desert.