What is Thermal?
Thermal definition and meaning on Dictionary terms:
Also thermic. of, relating to, or caused by heat or temperature: thermal capacity.
of, relating 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, especially such a current when not producing a cloud.
thermals. thermal underwear.