allobar

English

Etymology

allo- +‎ bar. According to Alfred J. Henry,[1] the meteorology sense was coined in Swedish by Nils Gustaf Ekholm.

Noun

allobar (plural allobars)

  1. (physics) Any form of an element having a different isotopic composition to that of the natural element, and thus a different atomic weight.
  2. (meteorology) An area where the atmospheric pressure changes.
    • 1999, Mark Monmonier, Air Apparent: How Meteorologists Learned to Map, Predict, and Dramatize Weather, page 82:
      Highlighted in Alfred Henry's 1916 manual, Weather Forecasting in the United States, pressure-change charts have their own terminology, with allobar describing an area where the barometric pressure has changed by 0.1 inch or more in 12 hours […]

References
  1. Alfred J. Henry (1916) “Auxiliary Pressure-change Charts”, in Weather Forecasting in the United States, page 79

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