Also, thermic. of, pertaining to, or caused by heat or temperature

thermal capacity.

of, pertaining to, or of the nature of thermae

thermal waters.

designed to aid in or promote the retention of body heat

a thermal blanket.

Meteorology . a rising air current caused by heating from the underlying surface, esp. such a current when not producing a cloud.

thermals. thermal underwear.

adjective

heated , hot , lukewarm , melting , roasting , scorching , sizzling , snug , summery , sweltering , thermic , toasty