-metry is a suffix relating to μέτρων = metron = measurement and is used with the 4 Elements: Earth Geo- Geometry Air Aero- Aerometry Fire Pyro- Pyrometry Waters Hydro- Hydrometry It is also used with the 4 qualities of the 4 Elements: Earth Cold Cryo- Cryometry Air Dry Aero- Aerometry Fire Hot Calor Calorimetry Thermo- Thermometry Pyro- Pyrometry Waters Wet Hydro- Hydrometry It is also used re: the senses Hearing Audio- Audiometry Sight Opto- Optometry Touch Hapt- Haptometry

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