[A unit of mass concentration defined as the concentration of one gram of a substance in unit volume of the mixture equal to one deciliter (100 milliliters). The concept also refers to the metric unit of mass density (volumic mass) defined as the density of substance which mass equal to one gram occupies the volume one deciliter. ( NCI )] (UMLS (NCI) C0439267) =Quantitative Concept =UnitOfMeasureAtomInsens; UnitOfMeasureAtomSens