isogeotherm

[ahy-suh-jee-uh-thurm]

noun

an imaginary line connecting all points within the earth having the same mean temperature.

Origin of isogeotherm

First recorded in 1860–65; iso- + geo- + therm
Also called geoisotherm.
Related formsi·so·ge·o·ther·mal, i·so·ge·o·ther·mic, adjective
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British Dictionary definitions for isogeotherm

isogeotherm

noun

an imaginary line below the surface of the earth connecting points of equal temperature
Derived Formsisogeothermal or isogeothermic, adjective
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