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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.

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

"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
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.

Etymology

Origin of isotherm

First recorded in 1855–60; back formation from isothermal

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.