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isallobars - 2 dictionary results
i·sal·lo·bar     (ī-sāl'ə-bär')  Pronunciation Key 
n.   A line on a weather map connecting places having equal changes in atmospheric pressure within a given period of time.


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

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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isallobar   (ī-sāl'ə-bär')  Pronunciation Key 
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 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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