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1

thermal

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adjective ther·mal \ˈthər-məl\

Simple Definition of thermal

  • : of, relating to, or caused by heat

  • : designed to keep you warm by preventing heat from leaving your body

  • : having hot water flowing out of the ground

Source: Merriam-Webster's Learner's Dictionary

Full Definition of thermal

  1. 1 [Latin thermae public baths, from Greek thermai, plural of thermē] :  of, relating to, or marked by the presence of hot springs <thermal waters>

  2. 2a :  of, relating to, or caused by heat <thermal stress> <thermal insulation>b :  being or involving a state of matter dependent upon temperature <thermal conductivity> <thermal agitation of molecular structure>c :  having low energies of the order of those due to thermal agitation <thermal neutrons>

  3. 3 :  designed (as with insulating air spaces) to prevent the dissipation of body heat <thermal underwear>

thermally

play \-mə-lē\ adverb

Did You Know?

In days gone by, much of the male population of the northern states in the cold months would wear a garment of thermal underwear covering the entire body, called a union suit. Union suits kept sodbusters, cowboys, and townsfolk alike not only warm but also itchy and a little on the smelly side (back when bathing once a week was considered the height of cleanliness). Thermal imaging is photography that captures "heat pictures"--rather than ordinary light pictures--of objects. And thermal pollution occurs when industrial water use ends up warming a river in a damaging way. Small-plane pilots use thermal as a noun for a warm updraft, often over a plowed field or desert, that lifts their wings, just as it enables hawks to soar upward without moving their wings.

Origin and Etymology of thermal

Greek thermē


First Known Use: 1742


2

thermal

noun ther·mal

Simple Definition of thermal

  • : a rising current of warm air that is produced when the sun heats an area of the ground

  • thermals : thermal clothing or underwear

Source: Merriam-Webster's Learner's Dictionary

Full Definition of thermal

  1. :  a rising body of warm air

1933

First Known Use of thermal

1933

Other Climate/Meteorology Terms



THERMAL Defined for Kids

thermal

play
adjective ther·mal \ˈthər-məl\

Definition of thermal for Students

  1. :  of, relating to, or caused by heat <thermal insulation>




Medical Dictionary

thermal

play
adjective ther·mal \ˈthər-məl\

Medical Definition of thermal

  1. 1:  of, relating to, or caused by heat <tactile and thermal senses>

  2. 2:  being or involving a state of matter dependent upon temperature <thermal agitation of molecular structure>

thermally

\-mə-lē\play adverb



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