All articles starting with F
15,892 articles
Folded unipole antenna
A folded unipole antenna is a vertical radiating structure, usually an AM broadcast tower, grounded at the base and fed through parallel skirt wires connected at the top.
Folding bicycle
A folding bicycle is a bicycle whose frame, handlebars, and pedals collapse into a compact package for carrying on trains, buses, and in cars, usually with 16 or 20 inch wheels.
Folding boxboard
Folding boxboard (FBB) is a multi-ply cartonboard with a bulky mechanical pulp core between bleached chemical plies, giving high stiffness at low weight for folding cartons.
Folding Ideas
Folding Ideas is the YouTube channel of Alberta-based Canadian documentarian Dan Olson, known for long-form video essays such as Line Goes Up – The Problem With NFTs and In Search Of A Flat Earth.
Folding@home
Folding@home, or F@H, is a nonprofit distributed-computing project launched by Vijay Pande at Stanford University in 2000 that simulates protein folding on volunteer computers; in 2020 it became the first computing system to pass an exaflop.
Foley (filmmaking)
Foley (filmmaking): performing and recording everyday sound effects, footsteps, cloth, props, in sync with picture during post-production; named after Universal's Jack Foley (1891–1967); first session on Show Boat (1929).
Foley catheter
Foley catheter, indwelling urinary catheter with an inflatable balloon tip, introduced by Frederic Foley in 1935; two-channel design for bladder drainage, used in 15-25% of hospitalized patients, main risks CAUTI and noninfectious complications.
Foley Island
Foley Island (Nunavut) is a 637 km2 low-lying Arctic island in Foxe Basin off southern Baffin Island, discovered by 1948 aerial surveys; distinct from smaller Foley Islands in New Brunswick and Ontario.
FOLFIRI
FOLFIRI is a cyclic intravenous chemotherapy regimen combining irinotecan, fluorouracil, and leucovorin, repeated every 14 days, used mainly as first-line treatment for metastatic colorectal cancer.
FOLFIRINOX
FOLFIRINOX is a four-drug chemotherapy regimen combining folinic acid, fluorouracil, irinotecan, and oxaliplatin, used first-line for metastatic pancreatic cancer, where it outperformed gemcitabine, and in modified form after resection.
FOLFOX
FOLFOX (Oxaliplatin de Gramont, OxMdG) is a combination chemotherapy regimen of leucovorin, fluorouracil, and oxaliplatin used to treat colorectal cancer, established as adjuvant standard for stage III colon cancer by the MOSAIC trial.
FOLFOX chemotherapy
FOLFOX, also known as Oxaliplatin de Gramont or OxMdG, is a combination chemotherapy regimen of folinic acid, fluorouracil, and oxaliplatin, used mainly to treat colorectal cancer.
FOLFOXIRI
FOLFOXIRI is a combination chemotherapy regimen pairing infusional fluorouracil with leucovorin, oxaliplatin, and irinotecan in two-weekly cycles, used mainly as first-line treatment for metastatic colorectal cancer.
Folgers
Folgers is an American coffee brand founded in San Francisco in 1850 by James A. Folger, known for cup-testing, the 1984 'Best Part of Wakin' Up' slogan, and P&G then J.M. Smucker ownership.
Folgore
S.S. Folgore Calcio, or SS Folgore Falciano Calcio, is a Sammarinese football club from Falciano founded in 1972; four-time Campionato Sammarinese champion and the first San Marino club in UEFA competition (Basel, 2000).
FOLH1
FOLH1 (folate hydrolase 1), also called PSMA, GCPII, or NAALADase, is a chromosome 11 gene encoding a 750-aa transmembrane enzyme that digests dietary folates and NAAG, is upregulated in prostate cancer and IBD, and is the target of PSMA-PET imaging and Pluvicto radioligand therapy.
Folhas Caídas
Folhas Caídas ("Fallen Leaves") is a collection of lyric poems by the Portuguese Romantic writer Almeida Garrett, published anonymously in 1853 and reflecting his love affair with Rosa Montufar.
Foliation
In differential geometry, a foliation partitions a smooth manifold into same-dimensional submanifolds called leaves, a notion introduced in the 1940s by Georges Reeb and Charles Ehresmann.
Folie à deux
Folie à deux, or shared psychotic disorder, is a rare condition in which delusions are transmitted from an inducer to a close associate. Also called induced delusional disorder; subtypes include folie imposée, communiquée, simultanée, and induite.
Folie à Deux (album)
Folie à Deux, Fall Out Boy's fourth studio album (2008, Island Def Jam), a French-titled, guest-heavy record with Elvis Costello, Pharrell, and Lil Wayne; its backlash preceded the band's 2009 hiatus.
Folies Bergère
Folies Bergère: historic Parisian music hall and cabaret at 32 rue Richer, opened 2 May 1869 on the site of the Les Colonnes d'Hercule store; famed for revues, Joséphine Baker's 1926 banana-belt debut, Art Déco 1928 redesign, and about 1,460 seats today.
Folinic acid
Folinic acid (leucovorin calcium, citrovorum factor), 5-formyltetrahydrofolate, a reduced folate used for methotrexate rescue, 5-FU modulation in FOLFOX/FOLFIRI, and, since March 2026, the first approved treatment for FOLR1 cerebral folate transport deficiency, not autism.
Folinic acid-responsive seizures
Folinic acid-responsive seizures (FARS), also called folinic acid responsive developmental and epileptic encephalopathy, is a rare neonatal epileptic encephalopathy with myoclonic and clonic seizures with apnea, responding to folinic acid; genetically identical to pyridoxine-dependent epilepsy (ALDH7A1) or caused by FOLR1 folate transport defects.
Folioceros
Folioceros, also written Folioceros D.C.Bharadwaj, is a genus of hornworts in Anthocerotaceae established in 1971, with about 17 Asian tropical species, pinnate thalli, dark elongated pseudoelaters, and a clade shared with Anthoceros.
Foliose lichen
Foliose lichen: leaf-like lichen growth form with flat lobes, distinct upper and lower surfaces, rhizine attachment, 0.5–4 mm/yr radial growth; distinct from crustose and fruticose forms; used in air-quality bioindication.
Folitixorin
Folitixorin (5,10-methylenetetrahydrofolate; CoFactor, ANX-510) is a folate-based biomodulator, INN 8881, UNII 0SXY5ET48B, that stabilizes FdUMP binding to thymidylate synthase to potentiate 5-fluorouracil; its [6R] isomer arfolitixorin failed superiority over leucovorin in the phase III AGENT trial.
Folk art
Folk art: community-rooted art learned through family, apprenticeship, or local custom rather than academies; handmade, often utilitarian or ritual, traditional yet innovative; term popularized in 1920s America, exhibited at MoMA in 1932.
Folk Bitch Trio
Folk Bitch Trio: Melbourne/Naarm indie-folk trio of Gracie Sinclair, Jeanie Pilkington, and Heide Peverelle, signed to Jagjaguwar; debut album Now Would Be a Good Time (July 25, 2025), three-part harmonies, "Boygenius if it was from the '40s" per Phoebe Bridgers.
Folk costume
Folk costume (also ethnic or traditional costume, German Tracht) is traditional apparel expressing regional, national, or ethnic identity, worn daily or ceremonially; it declined under industrialization, was revived as national dress in the 19th century, and persists through museums, heritage listings, and diaspora use.
Folk dance
Folk dance: traditional, informally learned social dancing of common people, also called traditional or ethnic dance. Distinct from stage and court dance; includes ritual, social, and national forms, IFD movement, staged ensembles, and UNESCO-listed traditions such as kolo and polonaise.