isotach

[ ahy-suh-tak ]
/ ˈaɪ səˌtæk /

noun Meteorology.

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

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Origin of isotach

1945–50; iso- + -tach<Greek tachýs swift; see tachy-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for isotach

isotach
/ (ˈaɪsəʊˌtæk) /

noun

a line on a map connecting points of equal wind speed

Word Origin for isotach

from iso- + Greek takhos 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