1. Lines on a weather map connecting points of equal atmospheric pressure at a given time or altitude.
Usage: Plural form; used in meteorology and weather forecasting
2. Atoms or nuclei of different elements that have the same mass number but different atomic numbers.
Usage: Chemistry and nuclear physics term

Examples

• The meteorologist drew isobars on the weather map to show pressure patterns.
• Closely spaced isobars indicate strong winds in that region.
• The forecast predicted rain where the isobars were tightly packed together.
• In chemistry, carbon-14 and nitrogen-14 are isobars with the same mass number.
• Weather stations use isobars to track the movement of high and low pressure systems.
• The isobars on the satellite image revealed a developing storm system.