Definitions for BAROMETER
bəˈrɒm ɪ tərbarom·e·ter

Princeton's WordNetRate this definition:5.0 / 1 vote

1. barometernoun

   an instrument that measures atmospheric pressure

WiktionaryRate this definition:5.0 / 1 vote

1. barometernoun

   An instrument for measuring atmospheric pressure

2. barometernoun

   Anything used as a gauge or indicator.

3. Etymology: From βάρος.

Samuel Johnson's DictionaryRate this definition:0.0 / 0 votes

1. BAROMETERnoun

   A machine for measuring the weight of the atmosphere, and the variations in it, in order chiefly to determine the changes of the weather. It differs from the baroscope, which only shews that the air is heavier at one time than another, without specifying the difference. The barometer is founded upon the Torricellian experiment, so called from Torricelli the inventor of it, at Florence, in 1643; which is a glass tube filled with mercury, horizontally sealed at one end; the other open and immerged in a bason of stagnant mercury; so that, as the weight of the atmosphere diminishes, the mercury in the tube will descend, and, as it encreases, the mercury will ascend; the column of mercury suspended in the tube, being always equal to the weight of the incumbent atmosphere. Many attempts have been made to render the changes in the barometer more sensible, in order to measure the atmosphere more accurately; and hence arose a great number of barometers, of different structures. Dr. Halley observes, in the Philosophical Transactions, that in calm weather, when the air is inclined to rain, the mercury is commonly low; in serene good settled weather, high. On great winds, though unaccompanied with rain, the mercury is lowest of all, with regard to the point of the compass the wind blows on. The greatest heights of the mercury are on easterly and north-easterly winds, cæteris paribus. After great storms of wind, when the mercury has been low, it rises again very fast. In calm frosty weather, it stands high. The more northerly places find greater alterations than the more southern; and within the tropicks, and near them, there is little or no variation of the height of the mercury. The rising of the mercury forebodes fair weather after foul, and an easterly or north-easterly wind; its falling portends southerly or westerly winds, or both. In a storm, the mercury beginning to rise, is a pretty sure sign that it begins to abate. But there are frequently great changes in the air, without any perceptible alteration in the barometer. The alterations of the weight of the air, are generally allowed to be the cause of those in the barometer; but philosophers cannot easily determine whence those alterations rise in the atmosphere.

   Etymology: from βάϱος, weight, and μέτϱον, measure.

   The measuring the heights of mountains, and finding the elevation of places above the level of the sea, hath been much promoted by barometrical experiments, founded upon that essential property of the air, its gravity or pressure. As the column of mercury in the barometer is counterpoised by a column of air of equal weight, so whatever causes make the air heavier or lighter, the pressure of it will be thereby encreased or lessened, and of consequence the mercury will rise or fall. Again, the air is condensed or expanded, in proportion to the weight or force that presses it. Hence it is, that the higher from the sea, in the midland countries, the mercury descends the lower; because the air becomes more rarified and lighter, and it falls lowest upon the tops of the highest mountains. John Harris.

   Gravity is another property of air, whereby it counterpoises a column of mercury from twenty-seven inches and one half to thirty and one half, the gravity of the atmosphere varying one tenth, which are its utmost limits; so that the exact specifick gravity of the air cannot be determined when the barometer stands at thirty inches, with a moderate heat of the weather. John Arbuthnot, on Air.

WikipediaRate this definition:0.0 / 0 votes

1. Barometer

   A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries. Barometers and pressure altimeters (the most basic and common type of altimeter) are essentially the same instrument, but used for different purposes. An altimeter is intended to be used at different levels matching the corresponding atmospheric pressure to the altitude, while a barometer is kept at the same level and measures subtle pressure changes caused by weather and elements of weather. The average atmospheric pressure on the earth's surface varies between 940 and 1040 hPa (mbar). The average atmospheric pressure at sea level is 1013 hPa (mbar).

ChatGPTRate this definition:0.0 / 0 votes

1. barometer

   A barometer is an instrument used to measure atmospheric pressure. It can forecast short term changes in the weather by indicating changes in pressure, with higher pressures often associated with clear, fair weather and lower pressures linked to storms or rain. They are commonly used in meteorology and climatology.

Webster DictionaryRate this definition:5.0 / 2 votes

1. Barometernoun

   an instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for ascertaining the height of any ascent

WikidataRate this definition:0.0 / 0 votes

1. Barometer

   A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather. Numerous measurements of air pressure are used within surface weather analysis to help find surface troughs, high pressure systems, and frontal boundaries.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Barometer

   bar-om′et-ėr, n. an instrument by which the weight or pressure of the atmosphere is measured, and changes of weather, or heights above sea-level, indicated.—adj. Baromet′ric.—adv. Baromet′rically.—n. Barom′etry. [Gr. baros, weight, metron, measure.]

The Standard Electrical DictionaryRate this definition:2.0 / 1 vote

1. Barometer

   An apparatus for measuring the pressure exerted by the atmosphere. It consists, in the mercurial form, of a glass tube, over 31 inches long, closed at one end, filled with mercury and inverted, with its open end immersed in a cistern of mercury. The column falls to a height proportional to the pressure of the atmosphere from 30 to 31 inches at the sea level. The "standard barometer" is a height of the mercury or of the "barometric column" of 30 inches or 760 centimeters, measured from the surface of the mercury in the cistern. The column of mercury is termed the barometric column. Above it in the tube is the Torricellian vacuum. [Transcriber's note: More accurately, 29.92 inches of mercury or 14.696 PSI.]

Dictionary of Nautical TermsRate this definition:0.0 / 0 votes

1. barometer

   A glass tube of 36 inches in length, filled with the open end upwards with refined mercury--thus boiled and suddenly inverted into a cistern, which is furnished with a leathern bag, on which the atmosphere, acting by its varying weight, presses the fluid metal up to corresponding heights in the tube, easily read off by an external scale attached thereto. By attentive observations on this simple prophet, practised seamen are enabled to foretell many approaching changes of wind or weather, and thus by shortening sail in time, save hull, spars, and lives. This instrument also affords the means of accurately determining the heights or depressions of mountains and valleys. This is the mercurial barometer; another, the aneroid barometer, invented by Monsr. Vidi, measures approximately, but not with the permanence of the mercurial. It is constructed to measure the weight of a column of air or pressure of the atmosphere, by pressure on a very delicate metallic box hermetically sealed. It is more sensible to passing changes, but not so reliable as the mercurial barometer. 29·60 is taken as the mean pressure in England; as it rises or falls below this mark, fine weather or strong winds may be looked for:--30·60 is very high, and 29·00 very low. The barometer is affected by the direction of the wind, thus N.N.E. is the highest, and S.S.W. the lowest--therefore these matters govern the decision of men of science, who are not led astray by the change of reading alone. The seaman pilot notes the heavens; the direction of the wind--and the pressure due to that direction--not forgetting sudden changes of temperature. Attention is due to the surface, whether convex or concave.

Military Dictionary and GazetteerRate this definition:0.0 / 0 votes

1. barometer

   An instrument for measuring the weight of the atmosphere. The form ordinarily used was invented in 1643, by Torricelli. It consists of a glass tube filled with mercury inverted in an open cup.

Matched Categories

1. • Measuring Instrument

How to pronounce BAROMETER?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say BAROMETER in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of BAROMETER in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of BAROMETER in Pythagorean Numerology is: 7

Examples of BAROMETER in a Sentence

1. James Abate:

   Stocks are now trading based on economic and profit activity and oil represents a very good barometer of economic activity.

2. United States:

   Apple is a barometer for United States tech stocks.

3. Mohammed Shtayyeh:

   For us, the most important test for any American administration is whether they can deliver Netanyahu on freezing settlements, this is the barometer for a successful peace administration or not.

4. Georges Benjamin:

   We look at the whole range of maternal-child health care as a great barometer of access to care, because there has been an emphasis over many years of making sure that women and children -- even low-income women and children -- get access to health care.

5. Jean Plantu of France:

   Cartoonists are the barometer for freedom of expression. When there is some little opening in Iran, we know it thanks to cartoonists.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=BAROMETER
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Barometer
3. ^ Samuel Johnson's Dictionary
   https://johnsonsdictionaryonline.com/views/search.php?term=BAROMETER
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Barometer
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/BAROMETER
7. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=BAROMETER
8. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=BAROMETER
9. ^ The Standard Electrical Dictionary
   https://www.gutenberg.org/cache/epub/26535/pg26535-images.html#:~:text=BAROMETER
10. ^ Dictionary of Nautical Terms
    https://www.gutenberg.org/cache/epub/26000/pg26000-images.html#:~:text=BAROMETER
11. ^ Military Dictionary and Gazetteer
    https://www.gutenberg.org/cache/epub/59563/pg59563-images.html