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isallotherm

American  
[ahy-sal-uh-thurm] / aɪˈsæl əˌθɜrm /

noun

Meteorology.

  1. a line on a weather map or chart connecting points having equal temperature variations within a given period of time.

Etymology

Origin of isallotherm

is- + allo- + -therm

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.