what is bis chemistry
bis-. 1. Prefix signifying two or twice. 2. chemistry used to denote the presence of two identical but separated complex groups in one molecule. Compare: bi- , di-. [L.].is-. 1. Prefix signifying two or twice. 2. chemistry used to denote the presence of two identical but separated complex groups in one molecule. Compare: bi- , di-. [L.].