Halide

Noun

1. Any salt of any halogen acid (such as hydrochloric acid, hydrofluoric acid, or hydroiodic acid).

   "sulfur halides such as disulfur dichloride"

2. Such a salt with a single halogen atom.

   "Potassium iodide is a halide."

3. The anionic form of a halogen atom (a group 17 element).

   "Iodide is a halide."