isotherm

[ ahy-suh-thurm ]

/ ˈaɪ səˌθɜrm /

noun

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

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

Nearby words

isotac, isotach, isotactic, isoteniscope, isothere, isotherm, isothermal, isothermal process, isothermobath, isothiocyanate, isotimic

Origin of isotherm

First recorded in 1855–60; back formation from isothermal

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for isotherm

Isotherm, a compound of two Greek words meaning equal temperature, is the name given in meteorology to such lines as this.
Practical Exercises in Elementary Meteorology|Robert DeCourcy Ward
The January isotherm of 15 F. skirts its northern shore; that of 40 crosses its southern border.
Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4|Various
The polar limits of the temperate zones are fixed by the isotherm of 50 for the warmest month.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various
On a second blank weather map draw an isotherm through your station inclined from northwest to southeast.
Practical Exercises in Elementary Meteorology|Robert DeCourcy Ward

A large area in the interior of Greenland, and one of about equal extent around the pole, are within the isotherm of 32.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various

British Dictionary definitions for isotherm

isotherm

/ (ˈaɪsəʊˌθɜːm) /

noun

a line on a map linking places of equal temperature

physics a curve on a graph that connects points of equal temperature

Also called: isothermal, isothermal line

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for isotherm

isotherm

[ ī′sə-thûrm′ ]

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.