Billion per Gram

**Semantic type:** Quantitative Concept

**Definition:** A unit of measurement equal to 10 to the ninth power of the number of entities per unit of mass equal to one gram.

**Synonyms:** - /ng - 1/ng - 10*9/g - 10*9/g - 10^12/kg - 10^3/ug - 10^6/mg - 10^9/g - 10^9/g - 10^9/g