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Arikara
The Arikara (Sahnish) are a Caddoan-speaking Missouri River earth lodge people of North and South Dakota, closely related to the Pawnee, now one of the Three Affiliated Tribes at Fort Berthold.
Arikara War
The Arikara War of 1823 was a conflict between the United States and the Arikara nation on the Missouri River, the first major U.S. expedition against the Plains Indians.
Arike Ogunbowale
Arike Ogunbowale, Dallas Wings guard (born 1997, Milwaukee), Notre Dame star, 2019 No. 5 pick, 2020 WNBA scoring champion, 2x All-Star MVP, franchise scoring leader, 2026 Unrivaled champion.
Arikesari Maravarman
Arikesari Maravarman (அரிகேசரி மாறவர்மன்) was an early Pandya king of southern Tamil Nadu, remembered for defeating the Chera at the battle of Nelveli and for his traditional conversion from Jainism to Saivism.
Arikhankharer
Arikhankharer (Arikankharer) was a 1st-century AD crown prince of the kingdom of Kush, son of the co-regents Natakamani and Amanitore, who died before he could come to power.
Arild Underdal
Arild Underdal (1946–2025) was a Norwegian political scientist at the University of Oslo, its rector from 2002 to 2005, known for research on the effectiveness of international environmental agreements.
Arima Harunobu
Arima Harunobu (有馬晴信, 1567–1612) was a Japanese daimyo of Hizen Province, based at Hinoe Castle, best known as a Christian lord who promoted the Jesuit mission in Japan.
Arima Kinen (有馬記念)
Arima Kinen (有馬記念), Japan's year-end G1 'Grand Prix' at Nakayama Racecourse since 1956, a 2,500m turf race whose top ten runners are chosen by fan vote; richest race alongside the Japan Cup.
Arima Nambi (அரிமா நம்பி)
Arima Nambi (அரிமா நம்பி) is a 2014 Tamil action thriller, Anand Shankar's directorial debut, starring Vikram Prabhu and Priya Anand, with Sivamani's first film score; released 4 July 2014, remade in Telugu as Dynamite (2015).
Arimaa
Arimaa: abstract strategy game invented by Omar Syed (2002 debut, 2003 ICGA paper), played on a chessboard with a chess set, four steps per turn, rabbit goal, trap squares; $10,000 Arimaa Challenge won by David Wu's SHARP in 2015; PSPACE-hard.
Arimanes Rupes
Arimanes Rupes is an IAU-named scarp (rupes) on Mars, approved 1985, named for a classical Persian deity of wickedness; about 181-193 km across near 9.7S, 212E, mapped by USGS SIM 2906.
Arimedadi taila
Arimedadi taila (Irimedadi/Erimedadi taila), a classical Ayurvedic sesame-oil-based polyherbal mouth oil for oil pulling and gum disease; clinical trials show plaque and gingivitis reduction comparable to 0.2% chlorhexidine over 21 days.
Arimoclomol
Arimoclomol (Miplyffa, formerly Meplyffa in Europe) is a hydroxylamine heat shock protein 70 co-inducer; FDA approved it September 20, 2024 as the first drug for Niemann-Pick disease type C, with miglustat, ages 2+; EMA refused EU approval in 2026.
Arin Hanson
Arin Hanson, also known as Egoraptor, is an American animator, voice actor, and comedian born in 1987, creator of the Awesome Series on Newgrounds and co-founder and co-host of the YouTube show Game Grumps with Dan Avidan, and a member of the band Starbomb.
Arin Karapet
Arin Karapet, born 1988, Swedish Riksdag member for the City of Stockholm since 2018, originally a Moderate Party politician, defected to the Sweden Democrats in March 2026; focused on migration, integration, and labor market policy.
Arina Averina
Arina Averina (Арина Аверина), Russian rhythmic gymnast born 1998 in Zavolzhye, identical twin of Dina Averina; two-time European all-around champion (2018, 2021), 2017 world ball and ribbon champion, fourth at Tokyo 2020, retired February 2024.
Arina Surkova
Arina Aleksandrovna Surkova (Арина Александровна Суркова, born 1998, Novokuznetsk) is a Russian sprint butterfly and freestyle swimmer; Tokyo 2020 Olympian for ROC and two-time 2024 short-course world champion in mixed medley relays.
ARINC
ARINC (Aeronautical Radio, Incorporated) is an aviation company incorporated in 1929 to provide radio communications to airlines, best known for its avionics standards and the ACARS data link.
ARINC 429
ARINC 429, the Digital Information Transfer System (DITS) specification published by Aeronautical Radio, Inc. in 1977, defines how avionics units exchange digital data on commercial aircraft, from the Boeing 757 to the Airbus A320.
ARINC 717
ARINC 717 is an avionics standard defining the data stream by which the flight data acquisition unit delivers flight parameters to the flight data recorder on transport aircraft.
Arinçkus stele of Argishti I
The Arinçkus stele of Argishti I is a fragmentary Urartian stela of King Argishti I (reigned about 785/80–756 BC), found at Arinçkus near Lake Van, Turkey.
Arindam Bose
Arindam Bose is a chemical engineer who retired from Pfizer in 2016 as a biosimilars executive and was elected to the National Academy of Engineering in 2017.
Arindam Chaudhuri (অরিন্দম চৌধুরী)
Arindam Chaudhuri (অরিন্দম চৌধুরী) is an Indian management author and businessman who built the business school IIPM into one of India's best known before its 2015 windup.
Arindam Ghosh (physicist)
Arindam Ghosh is an Indian condensed matter physicist, JRD Tata Chair Professor at the Indian Institute of Science, Bangalore, known for graphene–MoS2 optoelectronics and winner of the Infosys Prize 2020.
Arinna
Arinna was a sacred city of the Hittite kingdom in north-central Anatolia, holy since pre-Hittite times, whose Sun goddess became the state's chief deity; its location near Hattusa remains unknown.
Arinna Fluctus
Arinna Fluctus is an IAU-approved lava flow field (fluctus) on Jupiter's moon Io, 121.66 km across at 31.63°N, 149.19°W, named in 2000 for the Hittite sun goddess, with modeled thermal output of 52 GW.
Arinthum Ariyamalum (அறிந்தும் அறியாமலும்)
Arinthum Ariyamalum (அறிந்தும் அறியாமலும்) is a 2005 Tamil crime action film by Vishnuvardhan starring Navdeep, Arya, Prakash Raj, and Sameksha; a 175-day hit that launched Arya and won him Filmfare Best Male Debut – South.
Ariobarzanes of Persis
Ariobarzanes of Persis (آریوبرزن) was a Persian nobleman and military commander under Darius III who ambushed Alexander the Great's army at the Persian Gate in January 330 BC.
Ariocarpus retusus
Ariocarpus retusus (star rock, living rock, false peyote) is the type species of the living rock cacti, a spineless grey cactus from northeastern Mexico, 10–25 cm across, white autumn flowers, IUCN Least Concern but CITES Appendix I.
Ariocarpus scaphirostris
Ariocarpus scaphirostris (also spelled scaphirostrus), the Nuevo León living-rock cactus, is an endangered CITES Appendix I cactus endemic to Nuevo León, Mexico, with boat-shaped tubercles and a population down over 80% in 20 years.