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I_______
Definitions
a line drawn through geographical points at which a given phase of thunderstorm activity occurred simultaneously.
Word origin
From iso- + Ancient Greek βροντή (brontḗ, “thunder”) (see bronto-).
Used in a sentence
“On these charts isobronts, or lines of equal frequency of thunder, were drawn. These are shown in Figs. 1, 2 and 3, the data being expressed as percentages of days on which thunder was heard.”
Source: Wiktionary, CC BY-SA 4.0
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