All articles A–Z

Anabasis of Alexander (Ἀλεξάνδρου Ἀνάβασις)

Anabasis of Alexander (Ἀλεξάνδρου Ἀνάβασις), Arrian's seven-book 2nd-century Greek history of Alexander the Great, modeled on Xenophon's Anabasis, based on Ptolemy and Aristobulus, with the Indica as companion.

Sep 24, 2026

Anabasis of Antiochus III

The Anabasis of Antiochus III was the Seleucid king's eastern expedition of 212–205 BC through Parthia, Bactria, and India, earning him the title "the Great".

Anabatic wind

An anabatic wind is a wind that blows up a hillside or mountain slope during the day, driven by solar heating of the surface and strongest in the afternoon.

Anabel Englund

Anabel Englund (born 1992, New York) is an American house singer-songwriter and DJ, voice of Hot Natured's "Reverse Skydiving" and Pleasure State, and solo artist behind the 2020 album Messing with Magic.

Sep 27, 2026

Anabel Pereira Fernandez

Anabel Pereira Fernandez is a Venezuelan economist and lawyer who serves as Minister of Economy and Finance and Sectorial Vice President of Administration and Digital Government.

Anabelian geometry

Anabelian geometry, also known as the anabelian conjecture, is a branch of arithmetic geometry, proposed by Alexander Grothendieck in 1983, that reconstructs geometric objects from their fundamental groups.

Anabolic steroid

Anabolic-androgenic steroids (AAS) are synthetic testosterone derivatives used medically for testosterone deficiency, delayed puberty, and wasting, and abused at 10 to 100 times therapeutic doses for muscle and performance; Schedule III in the US and WADA-prohibited.

Anabolism

Anabolism: the building-up half of metabolism, in which small molecules are joined into larger ones, driven by insulin, mTOR, and protein intake, and balanced against catabolism by AMPK.

Anabranch

Anabranch: a stream channel that leaves a river and rejoins it downstream, from "anastomotic branch" (1834). Anabranching rivers have stable vegetated islands, unlike braided rivers, and cover 51% of global alluvial channel length.

Anabucis

Anabucis, an ancient fortified post (presidium) in Cyrenaica, Libya, on the coastal road 25 Roman miles east of the Arae Philenorum; known from the Antonine Itinerary, Tabula Peutingeriana, and Ravenna Cosmography, tentatively identified with el-Agheila.

Anacamptis morio

Anacamptis morio, the green-winged orchid (formerly Orchis morio), is a tuberous European orchid native to Europe and the Mediterranean to Iran that offers no nectar, deceives bee pollinators, and is Near Threatened in Europe.

Oct 22, 2026

Anacaona

Anacaona was a Taíno female chief, or cacica, who governed the chiefdom of Jaragua in southwestern Hispaniola and was hanged by Spanish governor Nicolás de Ovando in 1503.

Anacardiaceae

Anacardiaceae, the cashew or sumac family (R.Br., 1818), is a Sapindales family of about 80 genera and 800-870 species of resinous trees and shrubs, including cashew, mango, pistachio, sumac, and poison ivy (urushiol).

Anacardic acid

Anacardic acid is a phenolic lipid and salicylic acid derivative with a 15-carbon unsaturated side chain, making up 60 to 70 percent of natural cashew nut shell liquid.

Anacardium

Anacardium (cashew genus) is a Neotropical genus of 13 accepted species in Anacardiaceae, native from Mexico to tropical South America; its type species Anacardium occidentale is the cashew, the only economically important member.

Anacetrapib

Anacetrapib (MK-0859) is an investigational Merck CETP inhibitor that lowers LDL and raises HDL cholesterol, reduced cardiovascular events in the 30,449-patient REVEAL trial, but accumulates in adipose tissue and was never submitted for approval.

Anachronism

Anachronism: something placed outside its proper time, from Greek ana- (against) and khronos (time). Covers accidental and deliberate errors in literature and film, and the historiographic sin of judging the past by present-day categories, related to presentism and Whig history.

Sep 19, 2026

Anacleto Angelini

Anacleto Angelini Fabbri, known in Chile as Don Cleto, was an Italian-born Chilean businessman who arrived in 1948, built the AntarChile conglomerate around Empresas Copec, and became Chile's first billionaire.

Anaco-Barquisimeto Gas Pipeline

The Anaco-Barquisimeto Gas Pipeline (Gasoducto Anaco-Barquisimeto) is Venezuela's largest gas pipeline system in length and capacity, running 2,470 km from Anaco to Barquisimeto and operated by PDVSA.

Anaco-Puerto La Cruz Gas Pipeline

The Anaco-Puerto La Cruz Gas Pipeline is an operating natural gas pipeline in Anzoátegui state, Venezuela, running from Anaco to Puerto La Cruz and operated by PDVSA.

Anaco-Puerto Ordaz Gas Pipeline

The Anaco-Puerto Ordaz Gas Pipeline is a natural gas pipeline in Venezuela operated by PDVSA, in service since 1970 and supplying industries in Bolívar state.

Anaconda

Anaconda (Eunectes): South American aquatic boa constrictors; the green anaconda is the world's heaviest snake, up to 250 kg, while the reticulated python is longest; 2024 genetics split it into E. murinus and E. akayima.

Anaconda (1997 film)

Anaconda (1997 film) is a creature-feature thriller directed by Luis Llosa. It stars Jennifer Lopez and Jon Voight, and features a giant animatronic anaconda on the Amazon River.

Anaconda (2025 film)

Anaconda is a 2025 American meta action-comedy directed by Tom Gormican, starring Jack Black and Paul Rudd as friends hunted by a real anaconda in the Amazon.

Anaconda (film series)

Anaconda film series: American giant-snake creature-feature franchise starting with Anaconda (1997, dir. Luis Llosa, Jennifer Lopez, Jon Voight), continuing through Anacondas: The Hunt for the Blood Orchid (2004), direct-to-video sequels, Lake Placid vs. Anaconda, and the 2025 Jack Black–Paul Rudd meta comedy.