All articles starting with F
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Five Ways (Aquinas)
Five Ways (Quinque Viae): Thomas Aquinas's five a posteriori arguments for God in Summa Theologiae I q.2 a.3, from motion, causation, contingency, gradation, and order; first three cosmological, fifth teleological.
Five whys
Five whys, also called the 5 Whys, is a root cause analysis technique that repeats the question why, about five times, to trace a problem to its underlying cause.
Five Ws
Five Ws (5W1H, Five Ws and One H): journalism's checklist of who, what, when, where, why, and how, traditionally answered in a news lead; also used in problem analysis, forensics, and NLP event extraction.
Five Zones of Submission
The Five Zones of Submission (五服) is an idealized ancient Chinese scheme arranging lands around a royal capital in five concentric rings of service and tribute.
Five-axis machining
Five-axis machining is a subtractive manufacturing process where a milling cutter moves along three linear and two rotary axes, machining parts like impellers and turbine blades in a single setup.
Five-bar linkage
The five-bar linkage is a planar mechanism with five links and two degrees of freedom, driven by two actuators on its base, used in parallel robots.
Five-card draw
Five-card draw is a poker variant in which each player is dealt five private cards and may discard and replace up to three before a showdown.
Five-card stud
Five-card stud (5 Card Stud) is the oldest stud poker variant: one hole card and four upcards per player, four fixed-limit betting rounds, ante and bring-in. Dominant US poker game until overtaken by seven-card stud and Texas Hold'em.
Five-character verse
Five-character verse (五言詩, wuyan shi) is a classical Chinese poetic form in which every line has exactly five characters, arising from Han-dynasty folk song and dominant from the Tang onward.
Five-colored Parakeet on a Blossoming Apricot Branch
Five-colored Parakeet on a Blossoming Apricot Branch (五色鸚鵡圖, also called Apricot Blossom Parakeet) is a Song handscroll attributed to Emperor Huizong, datable to the 1110s, held in Boston.
Five-dimensional space
Five-dimensional space is a space with five independent dimensions, in which a point is specified by five coordinates; in physics it often means five-dimensional spacetime with one extra spatial dimension.
Five-hole probe
A five-hole probe is a pneumatic instrument, adapted from the Pitot-static probe, whose five pressure ports yield flow direction, velocity, total pressure, and static pressure via calibration.
Five-hundred-meter Aperture Spherical Telescope
The Five-hundred-meter Aperture Spherical Telescope, known as FAST or Tianyan, is a 500-meter radio telescope in Guizhou, China, completed in 2016, the world's largest single-dish radio telescope.
Five-Percent Nation
The Five-Percent Nation, also called the Nation of Gods and Earths, is an American movement founded in Harlem in the 1960s by Clarence 13X Smith.
Five-pin bowling
Five-pin bowling, a Canadian bowling variant invented by Tommy Ryan in Toronto in 1909, uses five valued pins (2-3-5-3-2 count), a small 3.5-pound ball, three balls per frame, and a 450 perfect game.
Five-pointed star
Five-pointed star: a five-point star figure, the heraldic mullet, introduced to national flags by the US Flag Act of 1777; distinct from the intersecting-line pentagram, rare on flags (Ethiopia, Morocco).
Five-Power Constitution Draft (Constitutional Draft of 1936)
The Five-Power Constitution Draft (五五宪草) was the Republic of China's draft constitution, promulgated on 5 May 1936 and serving as the starting point of the 1946 constitution.
Five-prime cap
Five-prime cap (m7GpppN): N7-methylguanosine joined 5′-to-5′ to eukaryotic and viral mRNA, added co-transcriptionally by triphosphatase, guanylyltransferase, and methyltransferase; cap-0/1/2 variants, decay, immunity, and vaccine capping methods.
Five-qubit code
The five-qubit code, also known as the Laflamme code, is a quantum error-correcting code denoted [[5,1,3]] that encodes one logical qubit into five, the minimum for correcting any single-qubit error.
Five-Rank Nobility and Marquis Fiefs of Cao Wei
The Five-Rank Nobility and Marquis Fiefs of Cao Wei (曹魏五等爵與列侯封國) was the enfeoffment system of Cao Wei, which opened a five-rank nobility in the Xianxi era.
Five-second rule
Five-second rule, also called three-second rule: folklore claim that food picked up off the floor within five seconds is safe. Rutgers 2016 research showed bacteria transfer in under one second; moisture and surface type matter more than timing.
Five-star rank
Five-star rank: the senior U.S. military grade (General of the Army, Fleet Admiral, General of the Air Force) created December 14, 1944 to match Allied field marshals; nine holders, last appointed 1950, dormant since Bradley died in 1981.
Five-state attack on Qin
The five-state attack on Qin (五国攻秦) was a series of coalition offensives by five Warring States against Qin, recorded in the Shiji and the Zizhi tongjian.
Five-Story Pagoda of Hōryū-ji
The Five-Story Pagoda of Hōryū-ji (法隆寺五重塔, Hōryū-ji Gojū-no-tō) is a wooden Buddhist pagoda at Hōryū-ji temple in Ikaruga, Nara Prefecture, Japan, the oldest surviving five-story wooden pagoda in the world.
Five-year plans of China
The five-year plans of China, also called the Chinese Five-Year Plans, are central development blueprints issued every five years, with the 15th covering 2026 to 2030.
Five-Year Plans of India
India's Five-Year Plans were national development programs run by the Planning Commission from 1951 to 2017, setting growth targets and allocating public investment across twelve plans.
Five-Year Plans of South Korea
The Five-Year Plans of South Korea were seven indicative economic development plans issued from 1962 to 1996, drafted by the Economic Planning Board and executed most intensively under Park Chung-hee.
Five-year plans of the Soviet Union
The five-year plans of the Soviet Union were state economic plans introduced in 1928, running until the thirteenth plan was cut short by the USSR's collapse in 1991.
Fivebough and Tuckerbil Swamps
Fivebough and Tuckerbil Swamps: two Ramsar-listed wetlands (designated 21 October 2002) near Leeton, Riverina, NSW, Australia, famed for waterbird diversity, threatened Australasian bittern and brolga, and Wiradjuri heritage at Koonadan.
Fiverr
Fiverr is an online marketplace, operating since 2010, where freelancers sell fixed-price services called Gigs that buyers purchase directly; it processed $1.09 billion in transactions from 3.4 million buyers in the year to June 2025.