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isobar
The Collaborative International Dictionary
Isobar

Isobar \I"so*bar\, n. [Iso- + Gr. ? weight.] (Phys. Geog.) A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a given time, or for a certain period (mean height), as for a year; an isopiestic line. [Written also isobare.]

Douglas Harper's Etymology Dictionary
isobar

1864, coined from Greek isos "equal" (see iso-) + baros "weight" (see grave (adj.)). Line connecting places with the same barometric pressure at the same time.

Wiktionary
isobar

n. 1 (context meteorology English) A line drawn on a map or chart connecting places of equal or constant pressure. 2 (context nuclear physics English) Either of two nuclides of different elements having the same mass number. 3 (context thermodynamics English) A set of points or conditions at constant pressure.

WordNet
isobar

n. an isogram connecting points having equal barometric pressure at a given time

Wikipedia
Isobar

Isobar may refer to:

  • Isobar (meteorology), a line connecting points of equal atmospheric pressure
  • Isobar (nuclide), one of multiple nuclides with the same mass but with different chemical elements
  • Isobar (company), an international network of digital marketing agencies
Isobar (nuclide)

Isobars are atoms ( nuclides) of different chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number (or number of protons) but have the same mass number. An example of a series of isobars would be S, Cl, Ar, K, and Ca. The nuclei of these nuclides all contain 40 nucleons; however, they contain varying numbers of protons and neutrons.

The term "isobars" (originally "isobares") for nuclides was suggested by Alfred Walter Stewart in 1918. It is derived from the Greek word isos, meaning "equal" and baros, meaning "weight".

Usage examples of "isobar".

At Salt Lake, Tulsa, Denver, Fort Worth, Albuquerque, the meteorology boys were bending over their maps and connecting points of like barometric pressure with isobar lines.

I read the gauge, squinted up at the sun, and then jabbed a finger on an isobar to one edge of the map.

The isobar pattern shows the pressure gradient growing ever steeper, sucking in gale-force winds behind and fuelling the system with energy.

This map was Perspex-framed and the isobars had been drawn in with Chinagraph pencil on the Perspex.

And then on the other side, over towards Greenland and Canada, more isobars drawn in with long, curving sweeps of hand and pencil.

And between the High and the Low the isobars narrowed until, just east of Iceland, they were almost touching.

He entered them in, connected them up, scoring the isobars with a red pencil.

Elaine on a jet crossing the country, sailing west like gods over isobars and occluded fronts and high-pressure systems, chasing the weather to its source.

A coldness that was not of isobars and pressure fronts congealed within her gut, a ball of frozen jelly heavy as hopelessness.

Two and a half million people watching the neighborhood isobars of war and truce.

Tsuya busy at his desk in the damp, dead silence of the station, inking in the isobars and isogeo-therms and isogals on a deep-level plutonic chart.

By the time it reached the eastern American seaboard a north-easter was blowing, and a score of meteorologists drew their isobars and noted laconically that winter would be early this year.

World Wide Web, made obsolete much of the most sophisticated modern military technology, curtailed global surveillance and reconnaissance, and forced local weathermen to draw isobars on maps of the continental United States rather than glide through CGI images rendered from weathersats.

Pointer said something about isobars, the staff-captain replied serenely that he did not expect to find any polar bears in these latitudes.

Channel 3 and watched Jenn expertly describing isobars and cold fronts and other things about which he knew she had no clue.