isobar

[ ahy-suh-bahr ]

/ ˈaɪ səˌbɑr /

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See synonyms for isobar on Thesaurus.com

noun

Meteorology. a line drawn on a weather map or chart that connects points at which the barometric pressure is the same.

Also i·so·bare

[ahy-suh-bair]. /ˈaɪ səˌbɛər/. Physics, Chemistry. one of two or more atoms having equal atomic weights but different atomic numbers.

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Compare isotope.

Origin of isobar

First recorded in 1860–65; from Greek isobarḗs “of equal weight,” from ísos (see iso-) + báros “weight” (see bar³)

OTHER WORDS FROM isobar

i·so·bar·ism, noun

Words nearby isobar

isoamyl benzyl ether, isoamyl group, isoamyl salicylate, isoantibody, isoantigen, isobar, isobaric, isobaric spin, isobath, isobathic, isobathytherm

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use isobar in a sentence

The most common value-added analyses on surface maps are isobars, pressure systems, and boundaries.
How to Read a Surface Weather Map|Dennis Mersereau|October 15, 2020|Outside Online
Agency execs from Dentsu shops like Isobar, 360i and Merkle will also contribute to the practice.
‘Exceeded our marketers readiness’: As e-commerce growth accelerates, Dentsu is adding a new practice to meet the demand|Kristina Monllos|July 30, 2020|Digiday
In most cases the 29.80-inch isobar furnishes a good limit, out to which the isobars may be traced.
Practical Exercises in Elementary Meteorology|Robert DeCourcy Ward

British Dictionary definitions for isobar

isobar

/ (ˈaɪsəʊˌbɑː) /

noun

a line on a map connecting places of equal atmospheric pressure, usually reduced to sea level for purposes of comparison, at a given time or period

physics any of two or more atoms that have the same mass number but different atomic numberstin-115 and indium-115 are isobars Compare isotope

Derived forms of isobar

isobarism, noun

Word Origin for isobar

C19: from Greek isobarēs of equal weight, from iso- + baros weight

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for isobar

isobar

[ ī′sə-bär′ ]

A line drawn on a weather map connecting places having the same atmospheric pressure. The distance between isobars indicates the barometric gradient (the degree of change in atmospheric pressure) across the region shown on the map. When the lines are close together, a strong pressure gradient is indicated, creating conditions for strong winds. When the lines are far apart, a weak pressure gradient is indicated and calm weather is forecast.