ˈ ̷ ̷ ̷ ̷ˌbränt noun
also iso·bron·ton -änt ə n, ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷, ˌ ̷ ̷ ̷ ̷ˈbrän.ˌtän
Etymology: isobront International Scientific Vocabulary is- + -bront (from Greek brontē thunder); isobronton from is- + -bronton (from Greek brontē thunder) — more at bront-
: a line on a chart marking the simultaneous development of a thunderstorm at different points on the earth's surface