isotach [ahy-suh-tak] Word Origin noun Meteorology.

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

Origin of isotach 1945–50; iso- + -tach Greek tachýs swift; see tachy- British Dictionary definitions for isotach isotach noun

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

Word Origin for isotach from iso- + Greek takhos speed

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