Isothermal

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Isothermal \I`so*ther"mal\, a. [Cf. F. isotherme.]
        (a) Relating to equality of temperature, or an isotherm.
        (b) (Phys. Geog.) Having reference to the geographical
            distribution of temperature, as exhibited by means of
            isotherms; as, an isothermal line; an isothermal
            chart.


            [1913 Webster]
  
     {Isothermal line}.
        (a) An isotherm.
        (b) A line drawn on a diagram of energy such that its
            ordinates represent the pressures of a substance
            corresponding to various volumes, while the absolute
            temperature is maintained at a constant value.
  
     {Isothermal zones}, spaces on opposite sides of the equator
        having the same mean temperature, and bounded by
        corresponding isothermal lines.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  isothermal
       adj : of a process or change taking place at constant temperature