geotherm
/ (ˈdʒiːəʊˌθɜːm) /
noun
a line or surface within or on the earth connecting points of equal temperature
the representation of such a line or surface on a map or diagram
Words nearby geotherm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Examples from the Web for geotherm
The dotted line may be assumed to be a geotherm having a temperature of viscosity.
The Birth-Time of the World and Other Scientific Essays|J. (John) Joly