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单词 isobar
释义

Definition of isobar in English:

isobar

noun ˈʌɪsə(ʊ)bɑːˈaɪsəˌbɑr
  • 1Meteorology
    A line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.

    Example sentencesExamples
    • Near the ground the winds are deflected across the contours, or isobars, towards the low pressure, due to friction.
    • 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.
    • The balance of forces is lost and the flow crosses the isobars (lines of equal air pressure) towards the low pressure.
    • When isobars on a weather chart are close together, it will be a blustery day…
    1. 1.1Physics A curve or formula representing a physical system at constant pressure.
      Example sentencesExamples
      • No discontinuous change occurs in either the compression isotherm or the heating isobar.
      • The heating isobar for the transformed monolayers remained virtually superimposable on the curve for films that had experienced no rapid compression.
      • 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.
  • 2Chemistry
    Each of two or more isotopes of different elements, with the same atomic weight.

Derivatives

  • isobaric

  • adjective ʌɪsə(ʊ)ˈbarɪkˌaɪsəˈbɑrɪk
    • A phase transition produced by isothermally increasing surface pressure can often be reversed during isobaric heating.
      Example sentencesExamples
      • Conversely, crust above the detachment undergoes nearly isobaric heating accompanied by brittle faulting with little or no uplift.
      • For all simulations, isothermal and isobaric conditions were assumed.
      • This diagram is the same as the one above except that the major pressure and wind zones have been replaced by a typical isobaric weather map.
      • However, the nature of this isobaric degassing is fundamentally different from that which occurs during decompression.

Origin

Mid 19th century: from Greek isobaros 'of equal weight', from isos 'equal' + baros 'weight'.

 
 

Definition of isobar in US English:

isobar

nounˈīsəˌbärˈaɪsəˌbɑr
  • 1Meteorology
    A line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.

    Example sentencesExamples
    • Near the ground the winds are deflected across the contours, or isobars, towards the low pressure, due to friction.
    • When isobars on a weather chart are close together, it will be a blustery day…
    • The balance of forces is lost and the flow crosses the isobars (lines of equal air pressure) towards the low pressure.
    • The tight spacing of the isobars indicates strong northerly winds, averaging some 50 km/h over much of Victoria.
    • Secret Meteorological Office charts show the alarming swirl of isobars converging in black lines over the Channel.
    1. 1.1Physics A curve or formula representing a physical system at constant pressure.
      Example sentencesExamples
      • 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.
      • No discontinuous change occurs in either the compression isotherm or the heating isobar.
      • The heating isobar for the transformed monolayers remained virtually superimposable on the curve for films that had experienced no rapid compression.
  • 2Chemistry
    Each of two or more isotopes of different elements, with the same atomic weight.

Origin

Mid 19th century: from Greek isobaros ‘of equal weight’, from isos ‘equal’ + baros ‘weight’.

 
 
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更新时间:2025/2/5 17:32:27