isobar

• POS: Noun
• HYPHEN: i=so=bar

CIDE DICTIONARY

isobar, n. [Iso- + Gr. weight.].

 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.  [1913 Webster]

OXFORD DICTIONARY

isobar, n.
1 a line on a map connecting positions having the same atmospheric pressure at a given time or on average over a given period.
2 a curve for a physical system at constant pressure.
3 one of two or more isotopes of different elements, with the same atomic weight.

Derivative

isobaric adj.

Etymology

Gk isobares of equal weight (as ISO-, baros weight)

THESAURUS

isobar

air mass, anticyclone, artificial isotope, cold front, cold sector, cyclone, deuterium, front, heavy hydrogen, high, high-pressure area, isomer, isometric, isometric line, isopiestic line, isotherm, isothermal line, isotone, isotope, low, low-pressure area, nuclear isomer, occluded front, polar front, protium, radioactive isotope, radioisotope, squall line, stationary front, strontium 90, warm front, weather map, wind-shift line

ROGET THESAURUS

isobar

Air

N air, common air, atmospheric air, atmosphere, aerosphere, open air, sky, welkin, blue sky, cloud, weather, climate, rise and fall of the barometer, isobar, aerology, aerometry, aeroscopy, aeroscopy, aerography, meteorology, climatology, pneumatics, eudioscope, baroscope, aeroscope, eudiometer, barometer, aerometer, aneroid, baroscope, weather gauge, weather glass, weather cock, exposure to the air, exposure to the weather, ventilation, aerostation, aeronautics, aeronaut, containing air, flatulent, effervescent, windy, atmospheric, airy, aerial, aeriform, meteorological, weatherwise, in the open air, a la belle etoile, al fresco, sub jove dio.