Definition of isobar in English:
1 Meteorology A line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.
- Secret Meteorological Office charts show the alarming swirl of isobars converging in black lines over the Channel.
- The tight spacing of the isobars indicates strong northerly winds, averaging some 50 km/h over much of Victoria.
- When isobars on a weather chart are close together, it will be a blustery day…
1.1 Physics A curve or formula representing a physical system at constant pressure.
- The heating isobar for the transformed monolayers remained virtually superimposable on the curve for films that had experienced no rapid compression.
- No discontinuous change occurs in either the compression isotherm or the heating isobar.
- For the heated film, the substantial reversion of the transformed film to the original behavior occurred without any discontinuous change in area or in the slope of the heating isobar.
mid 19th century: from Greek isobaros 'of equal weight', from isos 'equal' + baros 'weight'.
- Example sentences
- A phase transition produced by isothermally increasing surface pressure can often be reversed during isobaric heating.
- This diagram is the same as the one above except that the major pressure and wind zones have been replaced by a typical isobaric weather map.
- For all simulations, isothermal and isobaric conditions were assumed.
Definition of isobar in:
- US English dictionary
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