Definition of isallobar in English:

isallobar

noun

Meteorology
  • A line on a map connecting points at which the barometric pressure has changed by an equal amount during a specified time.

    • ‘Thus an isallobar would join all places in an area that show a change of +2 millibars, another -1 millibars, and so on.’

Origin

Early 20th century: from iso- ‘equal’+ allo- ‘other’+ bar.

Pronunciation:

isallobar

/ʌɪˈsalə(ʊ)bɑː/