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1. Relating to or associated with heat
   "thermal movements of molecules"; "thermal capacity"
   - thermic, caloric
    
2. Of or relating to a hot spring
   "thermal water"
    
3. Caused by or designed to retain heat
   "a thermal burn"; "thermal underwear"

1. Rising current of warm air

Derived forms: thermals

See also: heat, hot, hot spring, thermally

Type of: air current, current of air, wind

Antonym: nonthermal

Encyclopedia: Thermal Thermal, CA Thermal, California