1. .... (Chem.) In the composition of chemical names bi- denotes two atoms, parts, or equivalents of that constituent to the name of which it is prefixed...

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. .... (Chem.) The correspondence or resemblance of substances belonging to the same type or series; a similarity of composition varying by a small, reg...

4. A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it is the ...