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isotach

American  
[ahy-suh-tak] / ˈaɪ səˌtæk /

noun

Meteorology.

  1. a line on a weather map or chart connecting points where winds of equal speeds have been recorded.

isotach British  
/ ˈaɪsəʊˌtæk /

noun

  1. a line on a map connecting points of equal wind speed

"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

Etymology

Origin of isotach

1945–50; iso- + -tach < Greek tachýs swift; tachy-

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.