a line on a map connecting places of equal atmospheric pressure, usually reduced to sea level for purposes of comparison, at a given time or period any of two or more atoms that have the same mass number but different atomic numbers
Compare isotope
WordReference Random House Unabridged Dictionary of American English © 2025
i•so•bar
(ī′sə bär′),USA pronunciation n. Also, i•so•bare
(ī′sə bâr′).USA pronunciation [Physics, Chem.]one of two or more atoms having equal atomic weights but different atomic numbers. Cf. isotope.
i′so•bar′ism, n.
- Meteorologya line drawn on a weather map or chart that connects points at which the barometric pressure is the same.
- Greek isobaré̄s of equal weight. See iso-, baro-
- 1860–65
Collins Concise English Dictionary © HarperCollins Publishers::
'isobar' also found in these entries (note: many are not synonyms or translations):