1. .... (Chem.) To subject to the action of various solvents in order to remove all soluble substances or extractives; as, to _____ a drug successively w...

2. ...A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, th...

3. .... -- _____ brown (Chem.), an artificial dyestuff, produced as an explosive brown crystalline substance with a green or golden luster. It consists ...

4. .... (Chem & Crystallog.) Unrelated in chemical composition, though similar or indentical in certain other respects; as, borax and augite are homoemor...