noun
- Lines on a map or chart connecting points of equal wind speed.
Usage: meteorology; plural of isotach
Examples
- Meteorologists use isotachs to identify regions of strong wind currents in the upper atmosphere.
- The weather map displayed isotachs showing wind speeds at different altitudes.
- Isotachs help pilots understand wind patterns during flight planning.
- The jet stream is often depicted using isotachs on upper-level weather charts.