hydr - icin
- hydration
- hydraulic analog
- hydraulic gradient
- hydraulic jump
- hydraulic radius
- hydraulics
- hydrochlorofluorocarbons
- hydroclimatology
- hydrodynamic instability
- hydrodynamic pressure
- hydrodynamic stability
- hydrodynamically rough surface
- hydrodynamics
- hydrogen
- hydrogen balloon
- hydrogen line
- hydrogen scale of temperature
- hydrogen thermometer
- hydrogeochemistry
- hydrogeology
- hydrograph
- hydrographic station
- hydrography
- hydrologic accounting
- hydrologic balance
- hydrologic cycle
- hydrologic index
- hydrologic year
- hydrological basin
- hydrological forecast
- hydrology
- hydromagnetic emissions
- hydromagnetic waves
- hydromagnetics
- hydromechanics
- hydrometeor
- hydrometeor drag
- hydrometeorological forecast
- hydrometeorologist
- hydrometeorology
