Isobar

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The word isobar derives from the two ancient Greek words, ισος (isos), meaning 'equal', and βαρος (baros), meaning 'weight'.

In meteorology, thermodynamics, and similar science (and engineering), an isobar is a contour line of equal or constant pressure on a graph, plot, or map. (For further discussion, see under Contour line)

In nuclear physics, two nuclides with the same mass number are called isobars. For example, boron-12 and carbon-12 are isobars.

Isobar has also occasionally been used as a synonym for a heat pipe.

Isobar is the title of a 2007 science fiction film.

Isobar is an international network of digital marketing agencies.