, substance is that element of an object without which it would not exist, or what exists only by itself (''causa sui'')
, a substance is an Element , Compound with uniform composition. If a substance is not a Mixture it is called a Pure substance.
, substance is any Drug , chemical, or Biologic entity, as well as any material capable of being self-administered or Abused because of its Physiologic or Psychologic effects (''Mosby's'', p.1648)
'' Substance '', a 1988 Joy Division compilation album of Song s Recorded in 1977–1980
