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Adjective: thermal  thur-mul
  1. Relating to or associated with heat
    "thermal movements of molecules";
    - 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"
Noun: thermal  thur-mul
  1. Rising current of warm air

Derived forms: thermals

See also: hot

Type of: air current, current of air, wind

Antonym: nonthermal

Encyclopedia: Thermal, California