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isotherm

[ ahy-suh-thurm ]

noun

  1. Meteorology. a line on a weather map or chart connecting points having equal temperature.
  2. Also called isothermal line. Physics. a curve on which every point represents the same temperature.


isotherm

/ ˈaɪsəʊˌθɜːm /

noun

  1. a line on a map linking places of equal temperature
  2. physics a curve on a graph that connects points of equal temperature


isotherm

/ īsə-thûrm′ /

  1. A line drawn on a weather map connecting points that have the same temperature. Each point can mark one temperature reading or an average of several readings.


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Word History and Origins

Origin of isotherm1

First recorded in 1855–60; back formation from isothermal

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Example Sentences

Negroes, however, meet a climatic barrier in America at the isotherm of 5° Centigrade (41° F.).

The polar limits of the temperate zones are fixed by the isotherm of 50 for the warmest month.

Beyond the isotherm of 50 for the warmest month forest trees and cereals do not grow.

A large area in the interior of Greenland, and one of about equal extent around the pole, are within the isotherm of 32.

Its summit displays a glittering ice-cap, and we are certain to find the proper isotherm by climbing its umbrageous sides.

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