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Anterior horn motor neuron
Anterior horn motor neuron (anterior horn cell, ventral horn motor neuron): a lower motor neuron of the spinal cord's anterior horn, in Rexed lamina IX, with alpha and gamma types, that innervates skeletal muscle via acetylcholine at the neuromuscular junction as the final common pathway; targeted in ALS, SMA, and polio.
Anterior ischemic optic neuropathy
Anterior ischemic optic neuropathy (AION), also called NAION or AAION, is sudden infarction of the optic nerve head from posterior ciliary artery occlusion; the nonarteritic form is the most common acute optic neuropathy over age 50, while the arteritic form signals giant cell arteritis and is a steroid emergency.
Anterior pituitary
Anterior pituitary (adenohypophysis): front lobe of the pituitary gland in the sella turcica; five cell types secrete GH, prolactin, ACTH, TSH, FSH, and LH under hypothalamic portal control.
Anterior spinal artery syndrome
Anterior spinal artery syndrome (anterior cord syndrome) is infarction of the anterior two-thirds of the spinal cord, causing paralysis and pain-temperature loss with preserved vibration sense, most often after aortic surgery or atherosclerosis.
Anterior Temporal Lobectomy
Anterior temporal lobectomy (ATL), a neurosurgical resection of the anterior temporal lobe including amygdala, hippocampus, and parahippocampal gyrus, treats drug-resistant temporal lobe epilepsy; pioneered by Penfield and Falconer, it yields roughly 64% seizure freedom with visual field and memory risks.
Anterior urethral valve
Anterior urethral valve (AUV): a rare congenital semilunar fold on the ventral male urethra causing lower urinary tract obstruction in boys; diagnosed by VCUG, treated by endoscopic ablation, sometimes with posterior urethral valves.
Anterix
Anterix is an American wireless communications company holding the largest share of licensed 900 MHz spectrum in the United States, which it leases to utilities for private broadband networks.
Antero de Quental
Antero de Quental (1842–1891) was a Portuguese poet and philosopher from Ponta Delgada, Azores, the leading figure of the Generation of 70 and a cofounder of Portugal's socialist movement.
Antero Midstream Corp
Antero Midstream Corp is a Denver, Colorado-based midstream energy company providing gathering, compression, and water handling services to Antero Resources' natural gas production in West Virginia and Ohio.
Antero Resources
Antero Resources is an independent oil and gas company in Denver, Colorado, founded in 2002 to produce natural gas and NGLs from the Appalachian Basin.
Anterograde amnesia
Anterograde amnesia: inability to form new long-term memories after brain injury or disease, sparing working and implicit memory. Famous case H.M. (1953 medial temporal lobectomy); common causes include Alzheimer's disease, TBI, anoxia, Korsakoff syndrome.
Anterograde tracing
Anterograde tracing is a neuroanatomical method for mapping the output connections of a brain region, in which a tracer deposited at neuronal cell bodies is carried along axons to reveal where they project.
Anterolateral ligament reconstruction
Anterolateral ligament reconstruction (ALLR) is a knee surgery, usually combined with ACL reconstruction, that controls rotational instability; a randomized trial found graft failure fell from 10.3% to 4.2%.
Anteros (ντέρως)
Anteros (Ἀντέρως), Greek god of requited love and avenger of unrequited love, brother of Eros among the Erotes; son of Ares and Aphrodite or of Aphrodite alone, with an altar in Athens and a wrestling relief at Elis.
Anterus
Anterus, also Anteros, was the nineteenth pope, serving about six weeks from November 235 to January 236; he is venerated as a saint on 3 January.
Antes do Baile Verde
Antes do Baile Verde is a 1970 collection of 18 short stories by the Brazilian writer Lygia Fagundes Telles, blending psychological realism with the fantastic.
Anthaspidellidae
Anthaspidellidae is a family of extinct orchocladine lithistid demosponges, siliceous sponges with rigid interlocking desma skeletons, prominent reef builders from the middle Cambrian into the Ordovician.
Anthea Stewart
Anthea Dorine Stewart (nee Allin), born 1944 in Blantyre, Malawi, is a Zimbabwean field hockey player-coach who won the first Olympic women's hockey gold at Moscow 1980 after 25 caps for South Africa; mother of diver Evan Stewart.
Anthea Turner
Anthea Turner (born 1960, Stoke-on-Trent) is an English TV presenter known for Blue Peter (1992–94), GMTV, Top of the Pops, Wish You Were Here...?, and launching the National Lottery; now founder of skincare brand By Anthea.
Anthedon
Anthedon (Ἀνθηδών) names two ancient harbor towns: a Boeotian port on the Gulf of Euboea near Loukisia, first mentioned by Homer and destroyed by Sulla in 86 BC, and Gaza's first known seaport (Tida/Blakhiyeh), a UNESCO tentative-list site inhabited 800 BC to 1100 AD.
Anthée
Anthée (Onhaye, Namur, Belgium): the "Grand Bon Dieu" Gallo-Roman villa, largest known in Wallonia, with a 112-room residence, twenty courtyard buildings, about 12 hectares, occupied 1st to early 4th century AD.
Anthelmintic
An anthelmintic, also called an antihelminthic drug, kills or expels parasitic worms such as roundworms, flukes, and tapeworms; drug resistance is now the main threat to their use.
Anthem (novella)
Anthem is Ayn Rand's 1937 dystopian novella, first published in England in 1938 and in a revised American edition in 1946, set in a collectivist future where the word "I" has been erased and Equality 7-2521 rediscovers the Ego.
Anthem (video game)
Anthem (BioWare/EA, 2019) is an online-only live-service looter shooter with flying Javelin exosuits. Sold ~5 million copies, scored 59 on Metacritic; Anthem NEXT was canceled in 2021 and servers shut down January 12, 2026.
Anthem Biosciences
Anthem Biosciences is a Bangalore-based contract research, development, and manufacturing organization founded in 2006 by Ajay Bhardwaj and others, serving pharma and biotech clients from drug discovery through commercial manufacturing.
Anthem of Europe
Anthem of Europe: instrumental prelude to Beethoven's "Ode to Joy" (Ode an die Freude) from the Ninth Symphony, adopted by the Council of Europe in 1972 and the EU in 1985/1986; purely instrumental, no official lyrics.
Anthem of the Decades
Anthem of the Decades is an epic poem by South African poet Mazisi Kunene, written in Zulu and published in his own English translation in 1981.
Anthem of the Peaceful Army
Anthem of the Peaceful Army is the 2018 debut studio album by Michigan rock band Greta Van Fleet (Lava/Republic, 11 tracks). Known for its Led Zeppelin-derived retro hard rock, it scored a mixed 53 Metascore and drew polarized reviews.
Anthem of the Seas
Anthem of the Seas is a Quantum-class cruise ship operated by Royal Caribbean International, built by Meyer Werft in Germany and delivered in 2015, known for the North Star observation gondola.
Anthem of the Sun
Anthem of the Sun, the Grateful Dead's second studio album (July 18, 1968, Warner Bros.-Seven Arts), splices studio recording with multiple live performances into a psychedelic tape composition; five tracks, 38 minutes, later remixed in 1971.