allobar
nounEtymology From allo- + bar. According to Alfred J. Henry, the meteorology sense was coined in Swedish by Nils Gustaf Ekholm.
1
Natural sciences, Physical sciences, Physics Any form of an element having a different isotopic composition to that of the natural element, and thus a different atomic weight.
2
Climatology, Meteorology, Natural sciences An area where the atmospheric pressure changes.
- 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[…]1999, Mark Monmonier, Air Apparent: How Meteorologists Learned to Map, Predict, and Dramatize Weather, page 82: