THERMAL

[adjective] [before noun; not gradable] [specialized] - connected with heatAt room temperature, the thermal conductivity of a diamond (= its ability to carry heat) is about six times higher than that of a piece of copper.Triple glazing consists of three layers of glass separated by air spaces to give improved thermal or acoustic insulation.It was the Romans who first recognised the medicinal benefits of Hungary's thermal springs (= ones which produce hot water).Thermal imaging is the use of special electronic equipment, in conditions in which it is difficult to see, to create a picture based on the heat produced by a person or object.Firefighters use thermal imaging to search for people in buildings filled with smoke.Thermal underwear is underwear that has been specially designed to keep you warm.