All articles A–Z
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ANAIS-112
ANAIS-112 is a dark matter detection experiment at the Canfranc Underground Laboratory in Spain, using 112.5 kg of sodium iodide scintillators since 2017 to test the DAMA/LIBRA annual modulation claim.
Anaita Shroff Adajania
Anaita Shroff Adajania (born 1972, Mumbai) is an Indian fashion stylist, costume designer, and actress, former fashion director of Vogue India, stylist of the Dhoom series, and wife of director Homi Adajania.
Anak (עֲנָק)
Anak (עֲנָק) is a figure of the Hebrew Bible, ancestor of the Anakim, giants of the hill country around Hebron whose three sons were Ahiman, Sheshai, and Talmai.
Anak Mat Lela Gila
Anak Mat Lela Gila (The Son of Mad Mat Lela) is a satirical Malay novel by Ishak Haji Muhammad, better known as Pak Sako, first published in 1941.
Anak Semua Bangsa
Anak Semua Bangsa ("Child of All Nations") is a 1980 historical novel by Indonesian author Pramoedya Ananta Toer, the second book of the Buru Tetralogy.
Anakinra
Anakinra (Kineret) is a recombinant human interleukin-1 receptor antagonist, 153 amino acids with an N-terminal methionine, first approved in 2001 for rheumatoid arthritis and later for autoinflammatory syndromes and COVID-19.
Anaktoron at Pantalika
Anaktoron at Pantalika: megalithic multi-room building on the Pantalica acropolis, Sortino, Sicily, named by Paolo Orsi. Debated Bronze Age princely palace with Mycenaean influence, later Byzantine reoccupation.
Anal beads
Anal beads are a sex toy consisting of connected spheres, usually increasing in size, designed for insertion into the anus and removal during sexual activity.
Anal bleaching
Anal bleaching, also called perianal skin lightening, is a cosmetic procedure lightening skin around the anus with creams, chemical peels, or lasers; results are temporary and risks include burns, irritation, and worsened pigmentation.
Anal canal
The anal canal is the 2.5-4 cm terminal segment of the gastrointestinal tract between rectum and anus, divided by the dentate line, with involuntary internal and voluntary external sphincters governing continence.
Anal cancer
Anal cancer: malignancy of the anus, usually squamous cell carcinoma caused by HPV (especially HPV-16). Rising US incidence; treated mainly with 5-FU/mitomycin chemoradiation, surgery as salvage, retifanlimab approved 2025.
Anal Cunt
Anal Cunt (A.C., AxCx), American grindcore/noisecore band formed March 1, 1988 in Newton, Massachusetts by Seth Putnam; disbanded 2011 after his death; known for sub-minute songs and offensive titles; albums on Relapse and Earache.
Anal fissure
Anal fissure (fissure-in-ano), a painful longitudinal tear in the anal lining, most often posterior midline, caused by hard stools and sphincter hypertonia; treated with sitz baths, topical nitrates or calcium channel blockers, botulinum toxin, or lateral internal sphincterotomy.
Anal fistula
An anal fistula, also called fistula in ano, is an abnormal channel between the anal canal and nearby skin, usually after an anal abscess, and rarely heals without surgery.
Anal gland
Anal glands (anal sacs) are paired foul-smelling secretory sacs beside the anus in carnivores like dogs and skunks, used for scent marking or defense; commonly impacted, inflamed, abscessed, or cancerous in small-breed dogs.
Anal hygiene
Anal hygiene: cleaning the anus and perianal skin after defecation using toilet paper, water (bidets, washlets), or wipes. Japanese cohort studies found bidet use does not raise hemorrhoid or urogenital infection incidence, but overcleaning causes anal irritation and pruritus.
Anal masturbation
Anal masturbation: self-stimulation of the anus and rectum with fingers or anal toys (butt plugs, beads, prostate massagers). Key points: needs lubricant, flared-based toys, cleaning; negligible HIV risk per CDC.
Anal Pap smear
An anal Pap smear is a screening test that swabs cells from the anal canal to detect anal precancer and cancer, analogous to the cervical Pap test.
Anal polyp
Anal polyp (ICD-11 DB71, ICD-10 K62.0), also called anal canal polyp or anal papilla, is a descriptive term for benign intraluminal anal canal growths: hyperplastic, fibroepithelial, cloacogenic, adenoma, hypertrophied papilla; treated by excision with histology.
Anal pruritus
Anal pruritus (pruritus ani, perianal itching), ICD-11 EG60, is irritation of the anal margin and perianal skin causing an urge to scratch; usually idiopathic, worse at night, treated with hygiene, irritant avoidance, and topical therapy.
Anal sex
Anal sex is sexual activity involving the anus, also called anal intercourse, practiced across orientations. Covers anatomy, injury and STI risks, condoms, PrEP, doxyPEP, prevalence, stigma, and historical attitudes from antiquity onward.
Anal stage
Anal stage: second of Freud's five psychosexual stages, roughly 1–3 years, centered on anus, defecation, and toilet training; fixation yields anal-retentive or anal-expulsive character, a claim with weak empirical support.
Anala Mons
Anala Mons is a 525-km-wide volcanic mountain on Venus at 11°N, 14.1°E in western Eistla Regio, named in 1997 for a Hindu fertility goddess, formerly Anala Corona, with possible pyroclastic deposits.
Analamanga Region
Analamanga is a region of Madagascar in the central highlands, containing the capital Antananarivo. Created in 2004, it is the country's most populous region, with 14.1 percent of the population.
Analanjirofo Region
Analanjirofo, a region of northeastern Madagascar with capital Fénérive-Est, covers 22,384 km2, had 1,150,089 people in 2018, and is Madagascar's main clove-producing area, cyclone-exposed.
Analcime
Analcime, historically called analcite, is a hydrated sodium aluminosilicate zeolite mineral with the formula NaAlSi₂O₆·H₂O, best known for its trapezohedral crystals that mimic cubic symmetry and its close relationship to leucite.
Analco (historical)
Analco, also known as the Barrio de Analco, was a 1620 Spanish and Tlascalan suburb of Santa Fe, New Mexico, on the other side of the Santa Fe River.
Analects
The Analects (论语, Lunyu) is the Confucian classic of compiled sayings of Confucius and his disciples, in 20 chapters, canonized from the Eastern Han, made one of Zhu Xi's 1190 Four Books, and widely translated.
Analemma
An analemma is the figure-eight curve traced by the Sun's position in the sky when observed at the same mean time of day over a full year.
Anales de Cuauhtitlan
The Anales de Cuauhtitlan is a Nahuatl annalistic chronicle of the lordship of Cuauhtitlan, north of Mexico City, written between 1563 and 1570 by Nahua authors.