This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of, relating to, using, producing, or caused by heat.

adj. Intended or designed in such a way as to help retain body heat: thermal underwear.

n. A rising current of warm air.

n. A column of rising air in the lower atmosphere created by uneven heating of Earth's surface.

adj. pertaining to heat or temperature.

adj. providing efficient insulation so as to keep the body warm.

adj. Of or pertaining to heat; warm; hot.

adj. caused by or affected by heat.

adj. designed to retain heat.

Of or pertaining to heat.

Of or pertaining to thermæ.

adj. caused by or designed to retain heat

adj. relating to or associated with heat

n. rising current of warm air

adj. of or relating to a hot spring

"His use of the term thermal equilibrium between the atmosphere and surface is highly ambiguous."

hot    thermal spectrum   

wind    air current    current of air   

thermal alarm    thermal capacity    thermal analysis    thermal springs    thermal unit    thermal equator   

thermo-    therm   

thermally   

warm    hot    thermal column   

dermal    endodermal    epidermal    geothermal    hydrothermal    isothermal    mesodermal   

electrical    internal    optical    atmospheric    electro-magnetic    solar    environmental    molecular    digital    continuous