Bible Dictionaries
Isobront

Webster's Dictionary

(n.) An imaginary line, or a line on a chart, marking the simultaneous development of a thunderstorm, as noted by observing the time when the thunder is heard at different places.

Bibliography Information
Webster, Noah. Entry for 'Isobront'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​i/isobront.html. 1828.