thermal

Also thermic. of, relating to, or caused by heat or temperature: Buildings and sealed surfaces have a higher thermal capacity than soil and give up their heat more slowly at night.We speed up composting using a thermal treatment.

of or relating to hot springs or hot baths: The bubbly, hot spring pool derives its name from the character of its thermal waters.

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

thermal energy.

Also: thermic (ˈθɜːmɪk) of, relating to, caused by, or generating heat or increased temperature

hot or warm: thermal baths; thermal spring

meteorol a column of rising air caused by local unequal heating of the land surface, and used by gliders and birds to gain height

(plural) thermal garments, esp underclothes