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Anteater
Anteaters (Vermilingua, Xenarthra): four species, giant anteater, tamanduas, and silky anteater, toothless tropical American mammals eating ants and termites with a long sticky tongue; giant anteater is Vulnerable.
Antebellum (film)
Antebellum is a 2020 American horror thriller starring Janelle Monáe, the directorial debut of Gerard Bush and Christopher Renz, released on demand in the United States in September 2020.
Antebellum architecture
Antebellum architecture is the building tradition of the United States before the Civil War, identified above all with Greek Revival style, tall columns, and symmetrical facades.
Antebellum South
Antebellum South: the pre-Civil War southern United States (c. 1820–1860), a plantation society built on slavery and cotton, with roughly 4 million enslaved people by 1860 and cotton at 75 percent of world supply.
Antecedent (grammar)
Antecedent (grammar): the noun, phrase, or clause a pronoun refers to, also called the referent; postcedent covers pronoun-following cases. Core of pronoun-antecedent agreement and anaphora resolution.
Antechinus
Antechinus, a genus of about 15 small carnivorous dasyurid marsupials of Australia and New Guinea, in which all males die after one synchronized winter mating season from testosterone- and cortisol-driven immune collapse, while females may breed twice.
Antediluvian
Antediluvian means "before the Flood": the biblical world and period between the creation of humanity and Noah's Flood, or anything extremely old-fashioned. Sir Thomas Browne coined the word in 1646.
Antelope
Antelope: catch-all term for horned bovids that are not cattle, sheep, or goats; a paraphyletic group of over 140 species, mostly African, from the 3-kg royal antelope to the 1,200-kg gaur, with permanent keratin horns.
Antelope Canyon
Antelope Canyon (Tsé bighánílíní) is a Navajo Sandstone slot canyon on Navajo Nation land near Page, Arizona, toured only with authorized Navajo guides; Upper has midday light beams, Lower has ladders, and a 1997 flash flood killed 11.
Antelope Coal Mine
The Antelope Coal Mine is a large surface coal mine in Wyoming's Powder River Basin, operated by Navajo Transitional Energy Company and producing low-sulfur subbituminous coal shipped by rail.
Antelope Hills Expedition
The Antelope Hills Expedition was an 1858 Texas Ranger campaign under John S. "Rip" Ford against the Comanche, ending in the Battle of Little Robe Creek in Oklahoma.
Antelope Island
Antelope Island, largest island in Utah's Great Salt Lake, hosts Antelope Island State Park, reached by the Syracuse causeway. Known for its 1893-founded bison herd (550-700 animals), Fielding Garr Ranch, and dark-sky designation.
Antelope Valley
Antelope Valley: 3,000-square-mile high desert closed basin in the western Mojave, Los Angeles and Kern counties, California; cities Lancaster and Palmdale; agriculture-to-aerospace economy, Edwards AFB, adjudicated groundwater basin.
Antelope, Oregon
Antelope, Oregon: tiny incorporated city in Wasco County (population 37, elevation 2,654 ft), founded as a stage stop, renamed Rajneesh during the 1980s Rajneeshpuram takeover, now pursuing dark-sky tourism.
Antemnae
Antemnae (Ἄντεμναι) was an ancient Latin town on a hill at the Tiber–Aniene confluence north of Rome, on the Via Salaria; legendary opponent of Romulus, fortified outpost of Rome by the 6th century BC, later a villa site at Forte Antenne.
Antemoro Kingdom
The Antemoro Kingdom was a theocratic state in southeastern Madagascar, ruled by Islamized migrants from the late 1400s until the late 1800s and known for sorabe manuscripts.
Antena 3 (Spanish TV channel)
Antena 3, also called Antena 3 Televisión, is Spain's first private free-to-air TV channel, launched 25 January 1990, owned by Atresmedia (Grupo Planeta), and the country's most-watched channel with a 12.8% share in 2025.
Antenatal corticosteroid therapy
Antenatal corticosteroid therapy gives betamethasone or dexamethasone to pregnant women at high risk of preterm delivery to speed fetal lung maturation, cutting neonatal death and respiratory disease by roughly 30 to 50 percent.
Antengene (德琪医药)
Antengene Corporation Limited (德琪医药) is a China-founded, Hong Kong-listed oncology biopharmaceutical company founded by Jay Mei in 2017, which began as a clinical-stage in-licensing biotech and reported its first profit in 2026.
Antenna (music)
Antenna is a 2012 song by Fuse ODG that peaked at number 7 on the UK Singles Chart. It pioneered the integration of Ghanaian Azonto rhythm into British mainstream pop culture.
Antenna (radio)
An antenna is a device that converts guided waves, such as signals in a coaxial cable, into free-space electromagnetic waves, used to transmit or receive radio signals.
Antenna aperture
Antenna aperture is the area over which an antenna intercepts power from an incoming radio wave. Its effective area is proportional to gain, defined by Harald Friis in 1946.
Antenna deployment mechanism
An antenna deployment mechanism is the mechanical system that stows a spacecraft antenna for launch, releases it in orbit, and moves it into its operating position.
Antenna effect
The antenna effect, also called plasma-induced damage, is gate oxide degradation in integrated-circuit fabrication caused by charge accumulating on conductors during plasma etching and polishing.
Antenna efficiency
Antenna efficiency is the fraction of power delivered to an antenna that it actually radiates rather than dissipating as heat; radiation efficiency counts only ohmic losses, total efficiency also mismatch.
Antenna gain
Antenna gain measures how strongly an antenna radiates or receives in a given direction versus a reference antenna, combining directivity with efficiency and usually quoted in dBi or dBd.
Antenna pattern measurement
Antenna pattern measurement is the experimental determination of an antenna's radiation pattern, gain, and polarization, using far-field ranges, compact ranges, and near-field scanning, as codified in IEEE Std 149-2021.
Antenna selection
Antenna selection is a MIMO wireless communication technique in which only a subset of transmit or receive antennas is connected to RF chains, keeping most performance at lower cost.
Antenna tuner
An antenna tuner, also called an antenna tuning unit (ATU) or transmatch, is a network of adjustable inductors and capacitors that matches an antenna's impedance to a 50-ohm transmitter.
Antenna TV
Antenna TV is an American classic-television digital multicast network launched January 1, 2011 by Tribune Media, now owned by Nexstar, airing 1960s-1970s programming including Johnny Carson reruns from WGN-TV in Chicago, with sister network Rewind TV.