isotach [ahy-suh-tak] Word Origin noun Meteorology.
- 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
- a line on a map connecting points of equal wind speed
Word Origin for isotach from iso- + Greek takhos speed