Definitions for: Thermal

[n] rising current of warm air
[adj] caused by or designed to retain heat; "thermal springs"; "a thermal burn"; "thermal underwear"
[adj] relating to or associated with heat; "thermal movements of molecules"; "thermal capacity"; "thermic energy"; "the caloric effect of sunlight"

Webster (1913) Definition: Ther"mal, a. [L. thermae hot springs, fr. Gr. ?, pl.
of ? heat, fr. ? hot, warm, ? to warm, make hot; perhaps akin
to L. formus warm, and E. forceps.]
Of or pertaining to heat; warm; hot; as, the thermal unit;
thermal waters.

The thermal condition of the earth. --J. D.
Forbes.

Thermal conductivity, Thermal spectrum. See under
Conductivity, and Spectrum.

Thermal unit (Physics), a unit chosen for the comparison or
calculation of quantities of heat. The unit most commonly
employed is the amount of heat necessary to raise the
temperature of one gram or one pound of water from zero to
one degree Centigrade. See Calorie, and under Unit.

Synonyms: caloric, hot, thermic

Antonyms: nonthermal

See Also: air current, draft, draught

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