horo = - Ibyc =
- hydrogen electrode
- hydrogen fluoride
- hydrogen gas electrode
- hydrogen halide
- hydrogen hydroxide
- hydrogen iodide
- hydrogen ion
- hydrogen lamp
- hydrogen line
- hydrogen monoxide
- hydrogen nitrate
- hydrogen oxide
- hydrogen peroxide
- hydrogen potassium carbonate
- hydrogen selenide
- hydrogen sodium arsenate
- hydrogen spectral series
- hydrogen spectrum
- hydrogen station
- hydrogen sulfate