| 释义 |
isobar
i·so·bar I0250300 (ī′sə-bär′)n.1. A line on a weather map connecting points of equal atmospheric pressure. Also called isopiestic.2. Any of two or more kinds of atoms having the same atomic mass but different atomic numbers.
[iso- + Greek baros, weight; see gwerə- in Indo-European roots.]
i′so·bar′ic (-bär′ĭk, -băr′-) adj.isobar (ˈaɪsəʊˌbɑː) n1. (Physical Geography) 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 period2. (General Physics) physics any of two or more atoms that have the same mass number but different atomic numbers: tin-115 and indium-115 are isobars. Compare isotope[C19: from Greek isobarēs of equal weight, from iso- + baros weight] ˈisobarˌism ni•so•bar (ˈaɪ səˌbɑr)
n. 1. a line drawn on a weather map or chart that connects points at which the barometric pressure is the same. 2. Also, i′so•bare` (-ˌbɛər) one of two or more atoms having equal atomic weights but different atomic numbers. [1860–65; < Greek isobarḗs of equal weight] i`so•bar′ic (-ˈbær-) adj. i′so•bar`ism (-ˌbɑr-) n. i·so·bar (ī′sə-bär′) A line drawn on a weather map connecting places having the same atmospheric pressure.isobar
A line drawn on a map linking places with the same atmospheric pressure.Thesaurus| Noun | 1. |  isobar - (meteorology)an isogram connecting points having equal barometric pressure at a given timeweather chart, weather map - (meteorology) a map showing the principal meteorological elements at a given time and over an extended regionmeteorology - the earth science dealing with phenomena of the atmosphere (especially weather)isarithm, isogram, isopleth - a line drawn on a map connecting points having the same numerical value of some variable |
Translationsisobar
isobar (ī`səbär') or isobaric line (ī'səbăr`ĭk), line drawn on a weather map through points of equal atmospheric pressure. Isobars are used to define cyclones (low-pressure regions) and anticyclones (high-pressure regions). Weather maps are designed to depict the horizontal pressure distribution across an area of land, but atmospheric pressure also varies vertically, i.e., with altitude. To eliminate any consideration of the vertical variations of pressure, the barometer readings at all stations are reduced to their corresponding sea-level pressures before the isobars are drawn.Isobar (nuclear physics) One of two or more atoms which have a common mass number A but which differ in atomic number Z. Thus, although isobars possess approximately equal masses, they differ in chemical properties; they are atoms of different elements. Isobars whose atomic numbers differ by unity cannot both be stable; one will inevitably decay into the other. See Electron capture, Radioactivity isobar[′ī·sə‚bär] (meteorology) A line drawn through all points of equal atmospheric pressure along a given reference surface, such as a constant-height surface (notably mean sea level on surface charts), an isentropic surface, or the vertical plan of a synoptic cross section. (nuclear physics) One of two or more nuclides having the same number of nucleons in their nuclei but differing in their atomic numbers and chemical properties. (physics) A line connecting points of equal pressure along a given surface in a physical system. A line connecting points of equal pressure on a graph plotting thermodynamic variables. isobar A line on a map or a chart joining places of equal pressure.isobar1. Meteorology 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 2. Physics any of two or more atoms that have the same mass number but different atomic numbers isobar
isobar [i´so-bahr] 1. one of two or more chemical species with the same atomic weight but different atomic numbers.2. a line on a map or chart depicting the boundaries of an area of constant atmospheric pressure.i·so·bar (ī'sō-bar), 1. One of two or more nuclides having the same total number of protons plus neutrons, but with different distribution, for example, argon-40 with 18 protons and 22 neutrons, potassium-40 with 19 protons and 21 neutrons, calcium-40 with 20 protons and 20 neutrons. The product of a β-disintegration is an isobar of its parent. 2. The line on a map connecting points of equal barometric pressure. 3. Any curve or equation relating quantities measured at the same pressure. [iso- + G. baros, weight] i·so·bar (ī'sō-bahr) 1. One of two or more nuclides having the same total number of protons plus neutrons, but with different distribution. 2. The line on a map connecting points of equal barometric pressure. [iso- + G. baros, weight]iso·bar (ī'sō-bahr) One of two or more nuclides having the same total number of protons plus neutrons, but with different distribution. [iso- + G. baros, weight]See IB
See IBisobar
Words related to isobarnoun (meteorology)an isogram connecting points having equal barometric pressure at a given timeRelated Words- weather chart
- weather map
- meteorology
- isarithm
- isogram
- isopleth
|