Head: slang term used to encompass all attys, cartos, clearos, etc.

Heating Coil: The thing that gets hot! Generally a piece of nichrome or kanthal that has been wrapped around some kind of wick. Current flows through the coil, the coil gets hot, and vaporizes your e-liquid. You then vape happily.

High Resistance (HR): An atomizer or cartomizer with a higher Ohm rating than the standard equipment. This will allow the user to apply higher voltage to the coil.

HR: abbreviation for High Resistance.

HV Atty: An atty designed for higher voltage vaping, not for use with standard batterys due to low power.

HV Mod: A dual battery or boosted supply mod (modification) to allow higher power vaping.

Hybrid: there are hybrid APV’s which are a single PV which has a atomizer as part of the unit and no way to separate the PV and atomizer. I’m pretty sure every hybrid PV is based on a genesis atomizer. There’s also a hybrid atomizer