All articles starting with F
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Fell running
Fell running, also called hill running (Scotland) or mountain running, is British off-road racing over open fells with self-navigation by map and compass, no GPS, governed by the FRA; famous for the Bob Graham Round.
Fellatio
Fellatio, oral stimulation of the penis, is one of three types of oral sex with cunnilingus and anilingus. Practiced by over 85% of US adults 18-44; transmits STIs including gonorrhea, syphilis, HPV, and herpes, with low HIV risk.
Fellatio in Halacha
Fellatio in Halacha (ביאה דרך איברים) is the question of whether oral sex between a husband and wife is permitted under Jewish law, chiefly weighed against the prohibition of wasting seed.
Feller process
A Feller process, also called a Feller-Dynkin process, is a continuous-time Markov process introduced by William Feller in the 1950s that includes Brownian motion and all Lévy processes.
Felli
Felli (Fich) is a Moroccan two-player alquerque-type board game on a 13-point hourglass board, six pieces per side, with leaping captures, chained captures, and a Mullah promotion variant related to Bengal's Lau Kata Kati.
Fellini Satyricon
Fellini Satyricon (1969), Federico Fellini's loose adaptation of Petronius's fragmentary Roman novel, follows Encolpius and Ascyltus through a decadent ancient Rome; retitled after a dispute with Polidoro's rival version.
Fellipe Jack
Fellipe Jack (Fellipe Jack Ozilio Moreira Pacheco), Brazilian-Italian centre-back born 2006 in São Paulo; ex-Palmeiras youth, Como, Spezia, Catanzaro, now on loan at Cremonese in Serie B; Italy U20 international.
Fellow
Fellow: an academic and professional title meaning a university fellowship holder, a member of a trained professional body, or, as an adjective, a person sharing a job or interest; meanings vary by institution.
Fellow of the Royal Society
Fellow of the Royal Society (FRS): life membership of the UK's national academy of sciences, elected annually by two-thirds ballot from about 800 nominated candidates; up to 109 new Fellows including 24 Foreign Members join roughly 1,900 existing ones.
Fellow Travelers (miniseries)
Fellow Travelers (2023 Showtime/Paramount+ limited series) is Ron Nyswaner's eight-episode adaptation of Thomas Mallon's 2007 novel, starring Matt Bomer and Jonathan Bailey as lovers from the McCarthy-era Lavender Scare to the AIDS crisis.
Fellow traveller
Fellow traveller (fellow traveler, Russian poputchik) literally means a traveling companion; politically it denotes a Communist sympathizer who is not a party member, a term coined in Soviet usage by Lenin and Trotsky and widely used as Cold War derision.
Fellowship (medicine)
Fellowship (medicine): post-residency subspecialty training in graduate medical education, also called advanced GME. ACGME-accredited, typically 1-3 years, entered via the NRMP fellowship match, leading to ABMS subspecialty certification.
Felo Le Tee
Felo Le Tee, born Tsholofelo Mokhine, is a South African amapiano producer and DJ from Siyabuswa, Mpumalanga, known for the hits '66', 'Bopha', and 'Yebo Lapho (Gogo)'.
Felodipine
Felodipine, sold as Plendil, is a dihydropyridine calcium channel blocker that treats high blood pressure and stable angina by relaxing vascular smooth muscle, taken once daily as an extended-release tablet.
Felon (film)
Felon (2008) is an American prison drama directed and written by Ric Roman Waugh, starring Stephen Dorff, Val Kilmer, and Harold Perrineau; released July 18, 2008, shot partly at New Mexico State Penitentiary, Metascore 58.
Felony
Felony: the category of serious criminal offense in U.S. law, defined as a crime punishable by more than one year imprisonment (28 CFR § 105.22). Distinguished from misdemeanors and infractions; carries grand jury indictment in federal cases and collateral consequences such as disenfranchisement, firearms bans, and deportation.
Felony disenfranchisement in the United States
Felony disenfranchisement in the United States bars people with felony convictions from voting under state laws; 4 million Americans, 1.7% of voting-age adults, were disenfranchised in 2024, with sharp racial and state disparities.
Felony murder rule
Felony murder rule: American criminal law doctrine letting participants in a felony be charged with murder for deaths during the crime, without intent to kill; limited by merger, inherent dangerousness, and Enmund and Tison death penalty rulings.
Fels-Naptha
Fels-Naptha is an American laundry bar soap and stain remover introduced in 1894 by Fels & Company of Philadelphia, originally made with naphtha, a grease-cutting petroleum solvent.
Felsberg
The Felsberg is a mountain in the crystalline western Odenwald in Hesse, Germany, known for the Felsenmeer, a sea of boulders, and Roman quarrying that supplied stone to 4th-century Trier.
Felsic
Felsic, or acid lava, is the geological term for silica-rich igneous rocks and magmas rich in light-colored minerals like feldspar and quartz, typified by granite and rhyolite.
Felt
Felt: a nonwoven textile of matted, interlocked fibers, traditionally wool, made by wet felting or needle punching; the oldest known fabric (Turkish samples, 6500 BCE), used for yurts, hats, insulation, filtration, and acoustics.
Felt (band)
Felt: English indie pop and jangle pop band from Birmingham, formed 1979 by Lawrence Hayward, disbanded 1989 after ten albums and ten singles on Cherry Red and Creation Records; "Primitive Painters" topped the UK indie chart.
Felt (group)
FELT was a Japanese Touhou Project doujin music circle led by arranger NAGI☆, with vocalists 舞花, Vivienne, and 美歌, releasing vocal arrangements of ZUN's soundtracks from 2010 until its final albums at Comiket 99 in 2021.
Felton Earls
Felton Earls (1942–2026) was an American child psychiatrist and epidemiologist at Harvard who showed that collective efficacy, neighbors' shared trust and willingness to act, predicts lower neighborhood violence.
Feltwell
Feltwell, Norfolk: large fen-edge village and civil parish (5,376 ha, 65% fen) on the Cambridgeshire border, named from Old English, with Roman villas, a 4th-century bath house, and RAF Feltwell.
Felty's syndrome
Felty's syndrome (Chauffard-Still-Felty syndrome): rare triad of seropositive rheumatoid arthritis, splenomegaly, and neutropenia (ANC under 1500/mm3), described by Augustus Roi Felty in 1924, overlapping with T-LGL leukemia.
Feluda
Feluda (ফেলুদা), Pradosh Chandra Mitter, is Satyajit Ray's fictional Bengali private detective, first appearing in Sandesh in 1965; 35 completed stories, narrated by cousin Topshe, with Jatayu joining in Sonar Kella (1971), and adapted for film, TV, and streaming.
Feludar Goyendagiri
Feludar Goyendagiri (ফেলুদার গোয়েন্দাগিরি) is Satyajit Ray's first Feluda story, published in Sandesh in December 1965, and a Hoichoi Bengali web series (2022– ) starring Tota Roy Choudhury adapting Feluda mysteries.
Felvidek (video game)
Felvidek: 2024 RPG Maker JRPG by Jozef Pavelka and Vlado Ganaj, set in alternate 15th-century Slovakia; alcoholic knight Pavol fights Hussites, Ottomans, and folk horror; Steam Overwhelmingly Positive.