bromide

Salt of the halide series containing the Br− ion, which is formed when a bromine atom gains an electron.

The term ‘bromide’ is sometimes used to describe an organic compound containing a bromine atom, even though it is not ionic. Modern naming uses the term ‘bromo-’ in such cases. For example, the compound C2H5Br is now called bromoethane; its traditional name, still used sometimes, is ethyl bromide.