What is another word for isobar?
Pronunciation: [ˈa͡ɪsəbˌɑː] (IPA) 
An isobar is a line on a map of equal atmospheric pressure. Some synonyms for this term include isopiestic line, constant pressure contour, and isopleth. The term isopiestic line is commonly used in thermodynamics when discussing the properties of gas mixtures. Constant pressure contour is a more general term used in many areas of science, such as geology, where it is used to represent contours of equal pressure within underground rock formations. Isopleth is also a general term and is used to represent lines on a map that connect points of equal value, such as temperature or precipitation. Despite slight differences in usage, these synonyms generally refer to the same concept of representing equal atmospheric pressure on a map.
