isobar

Etymology
From +, equivalent to  +.

Noun

 * 1)  A line drawn on a map or chart connecting places of equal or constant pressure.
 * 2)  A set of points or conditions at constant pressure.
 * 3)  Either of two nuclides of different elements having the same mass number.
 * 1)  Either of two nuclides of different elements having the same mass number.

Usage notes

 * In meteorology, the term isobar most often refers to a line drawn through connected points of equal atmospheric pressure on a given reference surface — such as a constant height surface (notably mean-sea-level on surface charts), the vertical plane of a synoptic cross section, or a layer of the air unaffected by surface heating or cooling. The pattern of isobars has always been a main feature of surface chart analysis. (See ) It was standard procedure to draw isobars at 3-millibar intervals until the recent advent of constant pressure charts for upper-air analysis brought about the use of 4-millibar intervals to simplify the conversion from surface isobars to 1,000-millibar contour lines.
 * In meteorology, the term isobar most often refers to a line drawn through connected points of equal atmospheric pressure on a given reference surface — such as a constant height surface (notably mean-sea-level on surface charts), the vertical plane of a synoptic cross section, or a layer of the air unaffected by surface heating or cooling. The pattern of isobars has always been a main feature of surface chart analysis. (See ) It was standard procedure to draw isobars at 3-millibar intervals until the recent advent of constant pressure charts for upper-air analysis brought about the use of 4-millibar intervals to simplify the conversion from surface isobars to 1,000-millibar contour lines.

Translations

 * Arabic:
 * Armenian:
 * Catalan: isòbar
 * Dutch:
 * Esperanto: izobaro
 * Finnish:
 * French:
 * Galician: isobara
 * German:
 * Greek: ,
 * Hebrew:
 * Hindi: समदाब रेखा
 * Icelandic: þrýstilína
 * Ido:
 * Indonesian:
 * Irish: iseabar
 * Italian: isobara
 * Japanese:
 * Korean:
 * Latvian:
 * Macedonian: изобара
 * Maori: pae pēhanga, hua pēhanga
 * Polish:
 * Russian:
 * Tagalog: guhit ng kadiin
 * Thai:


 * French:
 * Italian: isobara
 * Tagalog: kadiin


 * Czech: izobar
 * French:
 * German: Isobar
 * Hindi: समभारिक
 * Irish: iseabar
 * Italian: nuclide isobaro, isobaro
 * Russian:
 * Tagalog: kadiin

Adjective

 * 1)  isobaric

Adjective

 * 1) isobaric