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AARP
Nonprofit, nonpartisan organization that addresses the needs and interests of Americans aged 50 and older. It was founded in 1958 by a retired teacher, Ethel Andrus, and merged in 1982 with the National Retired Teachers Assn., also founded by Andrus (1947). Its bimonthly magazine, Modern Maturity, has the largest circulation of any U.S. periodical. Its membership of more than 30 million and its members' reliably high voting turnout have made it one of the most powerful lobbying groups in the U.S.


Ai
Town, E Canaan, ancient Palestine. In the Bible (Joshua 7-8), it was destroyed by the Israelites under Joshua. Biblical references agree in locating Ai just east of Bethel (modern Baytin), at the Early Bronze Age site now called At-Tall. Excavations at Ai in 1933-35 uncovered a temple of the 3rd millennium BC. The biblical events at Ai are assigned to the period c.1400-1200 BC, when evidence indicates it was not in fact occupied; early tradition may have identified the Canaanite town under Bethel with the nearby ruins of At-Tall.


AIDS
Fatal transmissible disorder caused by HIV. AIDS, the last stage of HIV infection, is defined by the appearance of potentially lethal opportunistic infections. The first AIDS cases were identified in 1981, HIV was isolated in 1983, and blood tests were developed by 1985. In 2000, more than 35 million people worldwide were living with HIV, and over 15 million had died of AIDS. In the U.S., some 2 million people had been infected with HIV, 800,000 had been diagnosed with AIDS, and 450,000 had died. Sub-Saharan Africa remains the focus of infection, but the number of cases in S. and S.E. Asia and elsewhere continues to mount at an alarming rate as well. An initial acute illness usually resolves within weeks. Infected persons then generally have few or no symptoms for about 10 years. As the immune system deteriorates, they develop diseases such as Pneumocystis carinii pneumonia, cytomegalovirus, lymphoma, or Kaposi's sarcoma.


Ainu
People of Japan, originally residing throughout its four major islands. Pushed north by the Japanese people over the last 2,000 years, the few remaining pure Ainu today live principally in N Hokkaido, Sakhalin, and the Aleutians. Originally physically and culturally distinct from the Japanese, their language and origins and their role in Japanese history and prehistory have been the subject of scholarly debate. The Ainu were traditionally hunters, fishermen, and trappers; their religion centered on spirits believed to be present in animals and the natural world.


air
Mixture of gases constituting the earth's atmosphere. Some gases occur in steady concentrations. The most important are molecular nitrogen (N2), 78% by volume, and molecular oxygen (O2), 21%. Small amounts of argon (Ar; 1.9%), neon (Ne), helium (He), methane (CH4), krypton (Kr), hydrogen (H2), nitrous oxide (N2O), and xenon (Xe) are also ...

Top words beginning with I: ineffably, impaste, innovating, interradiate, iff, imf, ironside, intercursation, indulgentially, indigestion, idoneous, ionornis, inconscious, insultable, interjudgment, intermeasurable, incarnates, influenceabilities, imper, intelsat

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