isothermal

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ISOTHERMAL

a.[Gr. equal, proper, and heat. ] Having an equal degree of heat, or a like temperature.

ISOTHERMAL

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