Meanings
nounallobar (plural allobars)
plural allobars
- natural sciencesAny form of an element having a different isotopic composition to that of the natural element, and thus a different atomic weight.
- climatologyAn 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
Origin
From allo- + bar. According to Alfred J. Henry, the meteorology sense was coined in Swedish by Nils Gustaf Ekholm.
Full word history & related roots →Rhymes & wordplay
Anagrams
Cite this entry
APA
allobar. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/allobar
MLA
“allobar.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/allobar. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “allobar,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/allobar.
Source: allobar on Wiktionary, CC BY-SA 4.0.