See Also: isobar(medicine)
isobar(dictionary)
isobar(dictionary)

isobar (iou)



isobar noun. In sense 2 orig. isobare. M19.
[from Greek isobaros of equal weight, from iso- ISO- + bare-, baros weight, barus heavy.]
Physical Geography & Meteorology. A line (on a map or chart, or imaginary) connecting places at which the atmospheric pressure is the same (at a given time, or on average). M19.
Physics. A line or formula that represents a physical system at constant pressure. L19.
Physics. Each of two or more nuclides which have the same mass number but different atomic numbers (and so belong to different elements). E20.