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

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," 1910-12 — Volume 1 and Volume 2 by Chater, Arthur G.

The mean July temperature for the whole state is 81.8�; for the part S. of the 80� isotherm the average temperature for July is between 80� and 85�.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 7 "Geoponici" to "Germany" 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

The isotherm of zero dips far south across northern Texas, Arkansas, Mississippi, Alabama, and Tennessee; while in the upper Mississippi and Missouri Valleys the temperatures were from 20 to 40 degrees below zero.

From The Mentor: The Weather Serial Number 110; 1 July, 1916 by Talman, Charles Fitzhugh

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.