Isallobar

A line on a weather map drawn through points where similar changes in barometric pressure have occurred in a given period of time. Isallobars show regions of rising and falling pressure.
Found on http://www.aeroplanemonthly.com/glossary/

Isallobar

An isallobar is a line on a map passing through all the places with equal changes in pressure over a certain period.
Found on http://www.probertencyclopaedia.com/browse/AI.HTM

isallobar

isallobar A line on a weather chart connecting points of equal change of atmospheric pressure within a specified time period commonly used on synoptic surface charts to depict three-hourly local pressure tendencies.
Found on http://www.wordinfo.info/words/index/info/view_unit/2795/

isallobar

line connecting points of equal change in barometric pressure
Found on http://phrontistery.info/i.html

Isallobar

The line of equal change in atmospheric pressure during a certain time period. It marks the change i
Found on http://www.superglossary.com/Glossary/Science/Weather/

isallobar

The line of equal change in atmospheric pressure during a certain time period. It marks the change in pressure tendency.
Found on http://www.weather.com/glossary/i.html
No exact match found