Archimedes
(287-212 BCE) Greek mathematician and inventor. He wrote works on plane and solid geometry, arithmetic, and mechanics. He is best known for the lever and pulley.
Subject:
World History
Forum reference:
Book page:
http://course-notes.org/World_History
arch
A curved structure that shapes the edge of an open space, such as, a doorway, a window.
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Arafat , Yasir
(1929- ) President of the Palestine National Authority and Chairman of the Palestinian Liberation Organization. Considered by many to be a terrorist, he has in recent years been accepted as the legitimate authority to speak for the Palestinians. His goals is to create a homeland for the displaced Palestinians.
Subject:
arable
Land that is able to support the growing of crops.
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Arabic Numerals
A written number system created during the Gupta golden age in India, then adopted by the Islamic Empire before spreading further. Used throughout western civilization today.
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Arabic
A language that is the official language of several countries of North Africa and the Middle East, as well as the religion of Islam.
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aqueducts
Above ground structures used to carry water long distances. Built by the ancient Romans.
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appeasement
The policy of pacifying an aggressive nation in the hopes of avoiding further conflict.
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apartheid
A political policy in South Africa where black South Africans could only live in certain areas, were required to use separate trains, beaches, restaurants, and schools, and could not enter into an interracial marriage.
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antiseptic
An agent that helps prevent or reduce infection in wounds.
Subject:
Pages
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