isallobar

[ ahy-sal-uh-bahr ]

noun

, Meteorology.

1. a line on a weather map or chart connecting points having equal pressure changes.

isallobar

/ aɪˈsæləˌbɑː /

noun

1. meteorol a line on a map running through places experiencing equal pressure changes

isallobar

/ ī-săl′ə-bär′ /

1. 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 pattern—falling, rising, or steady—of pressure change.

Word History and Origins

Origin of isallobar¹

1910–15; is- + allo- + Greek báros “weight” ( isobar ( def ) )