isallobar

i·sal·lo·bar  (-sl-bär)

n.

A line on a weather map connecting places having equal changes in atmospheric pressure within a given period of time.

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[is(o)- + allo- + Greek baros, weight; see g^wer-¹ in Indo-European roots.]

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isallobar [ice-sal-oh-bar]

Noun

a line on a map connecting places with equal pressure changes [Greek isos equal + allos other + baros weight]

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isallobar  (-sl-bär)

A line on a weather map connecting places having equal changes in atmospheric pressure within a given period of time. Isallobars measure pressure tendency, a value that describes both the difference in barometric pressure at the beginning and end of a given time period as well as the patternfalling, rising, or steadyof pressure change.