isotherm

American  

[ahy-suh-thurm] / ˈaɪ səˌθɜrm /

noun

1. Meteorology. a line on a weather map or chart connecting points having equal temperature.

2. Also called isothermal line.  Physics. a curve on which every point represents the same temperature.

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isotherm British  

/ 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

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isotherm Scientific  

/ ī′sə-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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Etymology

Origin of isotherm

First recorded in 1855–60; back formation from isothermal

Example Sentences

In the southern hemisphere this isotherm crosses the southern extremity of South America, and runs fairly east and west around the globe there.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" by Various

They have also comparatively high temperatures; the isotherm for 10° C. goes down to a depth of about 500 metres in both these parts.

From The South Pole; an account of the Norwegian antarctic expedition in the "Fram," 1910-1912 — Volume 2 by Chater, Arthur G.

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

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" by Various

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

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" by Various

The isotherm which touches the southern limits of France passes midway between the source and mouth of the river.

From The French in the Heart of America by Finley, John