
[Middle English, winnowing fan, from Old English fann, from Latin vannus.]

[Short for FANATIC.]
For more information on fan, visit Britannica.com.
A fan moves gases by producing a low compression ratio, as in ventilation and pneumatic conveying of materials. The increase in density of the gas in passing through a fan is generally negligible; the pressure increase or head is usually measured in inches of water.
Blowers are fans that operate where the resistance to gas flow is predominantly downstream of the fan. Exhausters are fans that operate where the flow resistance is mainly upstream of the fan.
Fans are further classified as centrifugal or axial (see illustration). The housing provides an inlet and an outlet and confines the flow to the region swept out by the rotating impeller. The impeller imparts velocity to the gas, and this velocity changes to a pressure differential under the influence of the housing and ducts connected to inlet and outlet.

Fan types. (a) Centrifugal. (b) Axial.
verb
noun
Idioms beginning with fan:
fan the flames
In addition to the idiom beginning with fan, also see shit will hit the fan.
While fanatics abounded in the Old World, we Americans can claim credit for inventing a kinder, gentler version: the baseball fan. It happened in the 1880s, apparently thanks to Ted Sullivan, manager of the St. Louis Browns. According to an 1887 article in Sporting Life, a Philadelphia publication, "It was Ted who gave the nick-name of 'fans' to base ball cranks. You never hear a man called a 'fiend' out in the Western League cities. 'Fan' is the word that is invariably used. It is a quick way of saying 'fanatic.'"
A few years later, in 1896, Sullivan himself explained how he came up with the term: "The first season I was with [Chris] Von der Ahe [the team owner], Chris had a board of directors made up of cranks who had baseball on the brain, and they were always interfering with me and telling Chris how the team ought to be run. I told Chris that I didn't propose to be advised by a lot of fanatics. 'Vat dat you call it? Fans, eh?' said Chris. 'Yes, fans for short. They're a lot of fans, Chris,' I said. The expression was a hit with me. Comiskey and the players took it up, and then the newspapers."
By the turn of the century, the fiends (1865) and cranks (1882) were gone. A 1901 glossary noted that fan was "common among reporters," perhaps for its innocuous sound and breezy humor. Fan would also appeal to headline writers, hungry for short words.
As the first American sport to turn professional, baseball modeled fandom (1903) for the others. And fans were too useful to confine to sports. From early in the twentieth century, entertainers of all sorts, especially movie stars, cultivated their fans, leading to such phenomena as fan mail (1924), the fan letter (1932), and fan clubs (1941). Even science fiction got into the act with fan magazines in the 1930s, known also since 1940 as fanzines.
Without qualification, indicates a fan of science fiction, especially one who goes to cons and tends to hang out with other fans. Many hackers are fans, so this term has been imported from fannish slang; however, unlike much fannish slang it is recognized by most non-fannish hackers. Among SF fans the plural is correctly fen, but this usage is not automatic to hackers. “Laura reads the stuff occasionally but isn't really a fan.”
1. An air-moving device composed of a wheel or blade and housing or orifice plate. 2. During construction or demolition of a building, an upwardly projecting arrangement of scaffolding and netting that is intended to catch any debris that might otherwise fall to the ground. Also see axial-flow fan, centrifugal fan, plenum fan, propeller fan, return fan, supply fan, tubeaxial fan, vaneaxial fan.
An individual who is devoted to and enthusiastic about a given sport.
A spread in the futures markets created by taking offsetting positions in futures contracts for five-year treasury notes and ten-year treasury bonds.
Investopedia Says:
A FAN spread is created by either buying a futures contract for five-year treasury notes and selling a futures contract for ten-year treasury bonds or vice versa. Investors speculating on interest rate fluctuations will enter into this type of spread in hopes of under or overpriced treasuries.
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For those who are new to futures but want a solid understanding of them, this tutorial explains what futures contracts are, how they work and why investors use them. Futures Fundamentals
Applied primarily to the futures market, this indicator confirms trends and reversals. Discovering Open Interest - Part 1
Volume should inform your use of this indicator in confirming trends and reversals.
Discovering Open Interest - Part 2
Learn how to read the volume reports, look at the relation to liquidity and interpret volume using open interest. Interpreting Volume for the Futures Market
There's one simple hurdle in the transition from stock to futures options: learning about product specifications. Options On Futures: A World Of Potential Profit
They were great baseball fans.
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Fans are used to "cool off," a common metaphor for calming down after being in a highly emotional state. Fans can also have the opposite effect, however, by increasing the power of a raging fire (by feeding it with oxygen)-the source of such expressions as "fanning the flames." Old-fashioned folding fans can symbolize both women and the phases of the moon. Finally, electric fans can represent danger because of their blades and their potential for causing electrocution.

| family jewels, falsies, fall money | |
| fancy Dan, fancy man, fancy pants |
| FADH2, FADD, FAD | |
| FATZ, FBP, FBS |

Dansk (Danish)
1.
n. - vifte, ventilator, avneblæser, kasteskovl, vindfang, krøjeanordning
v. tr. - vifte, vifte væk, få til at flamme op
v. intr. - sprede sig vifteformet ud, slå ud
idioms:
2.
n. - fan, entusiast, ivrig dyrker af, beundrer
idioms:
Nederlands (Dutch)
fan, waaier, ventilator, propeller, windvaantje, gereedschap voor dorsen, waaiervormig lichaam van los gesteente, aanwakkeren, toewaaien, koelte toewaaien, wapperen, uitspreiden, dorsen, slaan, uit slaan (in honkbal), een serie kogels schieten
Français (French)
1.
n. - éventail, ventilateur, (Ind) soufflet, (Agric) tarare
v. tr. - éventer, souffler sur, (fig) attiser, envenimer, (Agric) vanner (le grain)
v. intr. - s'étaler en éventail
idioms:
2.
n. - fanatique, fana, admirateur
idioms:
Deutsch (German)
1.
n. - Fächer, Leitrad, Ventilator, Gebläse
v. - anfachen, fächeln, zufächeln
idioms:
2.
n. - Anhänger
idioms:
Ελληνική (Greek)
n. - βεντάλια, (μηχαν.) ανεμιστήρας, (καθομ.) θαυμαστής, οπαδός
v. - ριπίζω, ανεμίζω, αερίζω, κάνω αέρα (με βεντάλια κ.λπ.), φυσώ, αναρριπίζω (φωτιά κ.λπ.)
idioms:
Italiano (Italian)
soffiare, attizzare, sventolare, fare vento a, fan, patito, tifoso, ventaglio, ventilatore, ventola
idioms:
Português (Portuguese)
n. - fã (f) (m), ventilador (m)
v. - ventilar
idioms:
Русский (Russian)
обмахивать, раздувать, веер, кондиционер, поклонник
idioms:
Español (Spanish)
1.
n. - abanico, aventador, ventilador
v. tr. - soplar, avivar, avivar soplando, abanicar
v. intr. - pegarle repetidas veces a un animal en el flanco con un sombrero para que se mueva más rápido, extenderse en forma de abanico, lanzarse
idioms:
2.
n. - admirador, aficionado
idioms:
Svenska (Swedish)
n. - solfjäder, fläkt, fläktvanna, propeller
v. - fläkta på, underblåsa, sprida i solfjädersform, vanna (säd)
中文(简体)(Chinese (Simplified))
1. 扇子, 鼓风机, 风扇, 扇形物, 扇, 激起, 煽动, 驱走, 飘动, 拍翅
idioms:
2. 狂热爱好者, 迷, 狂热仰慕者
中文(繁體)(Chinese (Traditional))
1.
n. - 狂熱愛好者, 迷, 狂熱仰慕者
2.
n. - 扇子, 鼓風機, 風扇, 扇形物
v. tr. - 扇, 激起, 煽動, 驅走
v. intr. - 飄動, 拍翅
idioms:
한국어 (Korean)
1.
n. - 선풍기, 부채
v. tr. - (바람을) 일으키다
v. intr. - (바람이) 솔솔 불다
idioms:
2.
n. - (운동, 연예 등의) 열정적 애호가
日本語 (Japanese)
n. - うちわ, 扇, 扇風機, 扇形のもの, 箕, 三振, 熱心な愛好家
v. - 扇であおぐ, 吹き分ける, 扇形に広げる, 散開する, あおぐ, 扇動する
idioms:
العربيه (Arabic)
(الاسم) معجب , مروحه (فعل) يهوي
עברית (Hebrew)
n. - מניפה, מאוורר, מכשיר להפרדת חיטה מקש
v. tr. - איוורר, ליבה (אש, זעם)
v. intr. - נפרש בצורת מניפה, ליבה (אש, זעם)
n. - מעריץ של פעילות מסוימת או בדרן וכו', אוהד
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