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isallobar

[ahy-sal-uh-bahr] /aɪˈsæl əˌbɑr/
noun, Meteorology
1.
a line on a weather map or chart connecting points having equal pressure changes.
Origin
1910-1915
1910-15; is- + allo- + -bar
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for isallobar

isallobar

/aɪˈsæləˌbɑː/
noun
1.
(meteorol) a line on a map running through places experiencing equal pressure changes
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
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isallobar in Science
isallobar
  (ī-sāl'ə-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 pattern—falling, rising, or steady—of pressure change.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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