72,234 articles
Falcon
Falcon: a bird of prey of family Falconidae (Falco and relatives, caracaras), long pointed wings, kills with notched beak; peregrine stoops at 320 km/h; worldwide except Antarctica; 64 species.
FALCOn study
FALCOn (Facteur AnthropoLogique Cancer Orl), NCT03663985, is a completed French observational study from Institut Claudius Regaud on how surgeons', oncologists', and radiotherapists' anthropological and sociocultural factors influence head and neck cancer treatment decisions.
Falconidae
Falconidae, the falcon family (falcons, caracaras, forest-falcons; genus Falco), is a worldwide group of diurnal birds of prey, 64-65 species, that kill prey with the beak, include the 180 km/h stooping peregrine falcon, and serve 20,000 falconers.
Falconiformes
Falconiformes is an order of birds that in modern classifications contains a single family, Falconidae, comprising about 65 species of falcons, caracaras, and forest-falcons worldwide.
Falconry
Falconry, or hawking, is hunting wild quarry with trained birds of prey. Inscribed on UNESCO's Intangible Cultural Heritage list, it spans medieval royal courts, peregrine recovery programs, and modern licensed practice worldwide.
Faldaprevir
Faldaprevir (BI 201335) is Boehringer Ingelheim's once-daily, second-generation HCV NS3/4A protease inhibitor for genotype 1 hepatitis C; phase 3 completed but EMA application withdrawn in June 2014, never approved.
Fall armyworm
Fall armyworm (Spodoptera frugiperda), a noctuid moth native to the Americas and a major maize pest, invaded Africa in 2016 and Asia by 2018, causing estimated African maize losses of US$2.5–6.2 billion yearly without control; managed through integrated pest management, biopesticides, and biological control.
Fall prevention
Fall prevention: clinical, exercise, medication, and home-modification measures to reduce falls in older adults. Key facts: 684,000 global fall deaths yearly; exercise cuts fall rates ~30%; CDC STEADI screening.
Fallon R Goodman
Fallon R. Goodman is a clinical psychologist who studies social connection, social anxiety, and loneliness, and directs the Emotion and Resilience Laboratory at George Washington University in Washington, D.C.
Fallopia multiflora
Fallopia multiflora (何首乌, he shou wu; syn. Polygonum multiflorum, Reynoutria multiflora) is a Polygonaceae twining herb whose root tuber is the TCM tonic Heshouwu, used for anti-aging and hair-darkening but a leading herbal cause of idiosyncratic liver injury since 1996.
Fallopian tube
Fallopian tube (uterine tube, oviduct): one of a pair of 11-12 cm conduits from ovary to uterus, site of fertilization, named for Gabriele Falloppio; common site of ectopic pregnancy and origin of high-grade serous ovarian cancer.
Fallopian tube obstruction
Fallopian tube obstruction: blockage of one or both fallopian tubes causing tubal factor infertility (30–40% of female infertility). Diagnosed by HSG, HyCoSy/HyFoSy, laparoscopy; treated with tubal surgery, catheterization, or IVF.
Fallopian Tube Patency Tests
Fallopian tube patency tests, chiefly HSG, HyCoSy, HyFoSy, and laparoscopy with chromopertubation, determine whether the fallopian tubes are open; tubal factor causes up to 35% of infertility, driving test choice and accuracy trade-offs.
Fallow Deer
Fallow deer (Dama dama), a Mediterranean-native deer with palmate antlers and variable coats, now lives in 49 countries after Phoenician, Roman, and Norman introductions; Least Concern globally but invasive in places, with the endangered Persian fallow deer (Dama mesopotamica) as its close relative.
Fallow land
Fallow land: arable land left unsown and unharvested for one or more growing seasons to recover fertility, store moisture, or control weeds; also called summerfallow in dryland farming.
Fallow systems
Fallow systems: agricultural land-use systems alternating multi-year cropping with fallow periods, cultivated 33–66% of years (Ruthenberg). Include tropical shifting cultivation's 10–20 year rests and Mediterranean semiarid cereal–fallow rotations that restore soil fertility.
FallT2DMOLD trial
FallT2DMOLD (NCT06345118) is a randomized controlled trial at Vietnam's National Geriatric Hospital testing the 24-week Otago Exercise Program against standard care in 80 older adults with type 2 diabetes, measuring falls, TUG, and Berg Balance Scale.
False awakening
False awakening: a dream in which the sleeper believes they have woken up, typically during REM sleep. Also called a false awakening loop when repeated; related to lucid dreaming and sleep paralysis.
False gharial
False gharial (Tomistoma schlegelii), also Sunda gavial or Malayan gharial: an endangered long-snouted freshwater crocodilian of Indonesia, Malaysia, and Brunei, historically placed in Crocodylidae but molecularly allied with the true gharial Gavialis.
False killer whale
False killer whale (Pseudorca crassidens), a large dark dolphin of tropical and subtropical oceans; only the main Hawaiian Islands insular population, about 139 whales, is endangered.
False Positive Reactions
False Positive Reactions: MeSH descriptor D005189 for positive test results in people lacking the tested attribute, i.e., healthy people labeled diseased; rate equals 1 minus specificity, driven by low prevalence and low pretest probability.
False pregnancy
False pregnancy (pseudocyesis, phantom pregnancy) is a rare psychosomatic syndrome in which a nonpregnant person believes they are pregnant and shows real pregnancy signs, with negative hCG tests and ultrasound, treated with imaging confirmation plus psychological care.
False-positive serological test for syphilis
False-positive serological test for syphilis (biologic false positive, BFP; ICD-11 MA14.16): a reactive nontreponemal test such as RPR or VDRL caused by conditions other than syphilis, including autoimmune disease, HIV, malaria, pregnancy, and vaccination; occurs in roughly 0.2%–0.8% of the population and is resolved by confirmatory treponemal testing.
FAMACHA
FAMACHA (FAffa MAlan CHart) is a South African eye-color scoring system for sheep and goats that detects Haemonchus contortus anemia on a 1–5 card scale, guiding selective deworming to slow anthelmintic resistance.
FAME trial (NCT03709147)
FAME trial (NCT03709147): phase II Milan trial testing metformin with or without fasting-mimicking diet added to platinum-pemetrexed chemoimmunotherapy for advanced LKB1-inactive lung adenocarcinoma; terminated for low recruitment.
FAME trial (NCT03955003)
FAME trial (NCT03955003), the Fatigue, Anxiety, Music, and Entertainment Study, a University of Utah randomized pilot feasibility trial of six-week group drumming versus attention control for fatigue, anxiety, and cognition in cancer patients; completed 2020, 21 participants.
Familial abdominal aortic aneurysm
Familial abdominal aortic aneurysm is a form of aortic aneurysm that runs in families, affecting people with an affected parent, sibling, or child; it tends to rupture more often.
Familial acute necrotizing encephalopathy
Familial acute necrotizing encephalopathy (ADANE, ANE1, IIAE3) is a rare autosomal dominant encephalopathy triggered by viral infection, caused mainly by RANBP2 missense mutations, with incomplete penetrance, recurrent episodes, and roughly one-third mortality.
Familial adenomatous polyposis
Familial adenomatous polyposis (FAP, classic FAP): autosomal dominant APC-gene disorder causing hundreds to thousands of colorectal adenomas, very high early colorectal cancer risk, managed by colonoscopy from age 10-15 and colectomy.
Familial adult myoclonic epilepsy
Familial adult myoclonic epilepsy (FAME, BAFME, FCMTE) is a rare autosomal dominant epilepsy with cortical tremor and myoclonus from adolescence, caused by intronic TTTTA/TTTCA repeat expansions in six genes including SAMD12.