halide

noun4

1. •
   Any salt of any halogen acid (such as hydrochloric acid, hydrofluoric acid, or hydroiodic acid).
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.
4. •
   (informal) A metal halide lamp.

   • Yes, heating is a problem with basically any reef set-up in the summer in a non-ACed house, and halides make it worse. — 1996