i·so·bar (  s -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 gwer -1 in Indo-European roots.]i so·baric (-bär k, -b r-) adj. |
isobar [ˈaɪsəʊˌbɑː]
n
1. (Earth Sciences / 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 period
2. (Physics / 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
[from Greek isobarēs of equal weight, from iso- + baros weight]
isobarism n
| isobar (s-bär) A line drawn on a weather map connecting places having the same atmospheric pressure. The distance between isobars indicates the barometric gradient (the degree of change in atmospheric pressure) across the region shown on the map. When the lines are close together, a strong pressure gradient is indicated, creating conditions for strong winds. When the lines are far apart, a weak pressure gradient is indicated and calm weather is forecast. |
ThesaurusLegend: Synonyms Related Words Antonyms
| 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 region meteorology - the earth science dealing with phenomena of the atmosphere (especially weather) |
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