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3 definitions found
 for Thermal
From The Collaborative International Dictionary of English v.0.48 :

  Thermal \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.]
     1. Of or pertaining to heat; warm; hot; as, the thermal unit;
        thermal waters.
        [1913 Webster]
  
              The thermal condition of the earth.   --J. D.
                                                    Forbes.
        [1913 Webster]
  
     2. caused by or affected by heat; as, thermal springs.
        [PJC]
  
     3. designed to retain heat; as, thermal underwear.
        [PJC]
  
     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.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  thermal
      adj 1: relating to or associated with heat; "thermal movements
             of molecules"; "thermal capacity"; "thermic energy"; "the
             caloric effect of sunlight" [syn: thermal, thermic,
             caloric] [ant: nonthermal]
      2: of or relating to a hot spring; "thermal water"
      3: caused by or designed to retain heat; "a thermal burn";
         "thermal underwear"
      n 1: rising current of warm air

From Moby Thesaurus II by Grady Ward, 1.0 :

  26 Moby Thesaurus words for "thermal":
     aestival, blood-hot, blood-warm, calid, equatorial, fire storm,
     genial, hot air, luke, lukewarm, mild, room-temperature,
     subtropical, summery, sunny, sunshiny, superheated air, temperate,
     tepid, thermic, toasty, tropical, unfrozen, warm, warm as toast,
     warmish
  
  

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