1. (

• thermal

) rising current of warm air ;

1. (

• thermal ,
• thermic ,
• caloric

) relating to or associated with heat; "thermal movements of molecules"; "thermal capacity"; "thermic energy"; "the caloric effect of sunlight" ;

2. (

• thermal ,

) of or relating to a hot spring; "thermal water" ;

3. (

• thermal

) caused by or designed to retain heat; "a thermal burn"; "thermal underwear" ;