isotherm

noun

iso·​therm ˈī-sə-ˌthərm 

1

: a line on a map or chart of the earth's surface connecting points having the same temperature at a given time or the same mean temperature for a given period

2

: a line on a chart representing changes of volume or pressure under conditions of constant temperature

Examples of isotherm in a Sentence

Recent Examples on the Web

Joining the exodus were a 70-year-old Syrian grandmother with only flip-flops to protect her feet from piercing cold and a six-day-old baby from Afghanistan wrapped in an isotherm bag. — David Gauthier-Villars, WSJ, 4 Mar. 2020

The isotherm lines on Humboldt’s map had ups and downs that deviated from lines of latitude. — Greg Miller, Smithsonian, 16 Oct. 2019

Both locations sit at something called a zero degree isotherm, where the average air temperature hovers right around the freezing point of water. — Megan Molteni, WIRED, 30 Aug. 2016

Word History

Etymology

French isotherme, adjective

First Known Use

1859, in the meaning defined at sense 1

Rhymes for isotherm

• disaffirm
• ectoderm
• endoderm
• endosperm
• interfirm
• mesoderm
• periderm
• reaffirm
• affirm
• bookworm
• budworm
• confirm

Kids Definition

isotherm

noun

iso·​therm ˈī-sə-ˌthərm 

: a line on a map connecting points having the same temperature

Medical Definition

isotherm

noun

iso·​therm ˈī-sə-ˌthərm 

: a line on a chart representing changes of volume or pressure under conditions of constant temperature