- a line on a weather map or chart connecting various points where a given phase of thunderstorm activity occurred simultaneously.
Origin of isobront
1885–90; iso- + -bront < Greek brontḗ thunder
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for isobront
Isobront, ī′so-bront, n. a line on a map connecting points at which a peal of thunder is heard simultaneously.