Archibald Prize is an art prize worth 10,000 Australian dollars that is awarded each year for portrait painting.
Archimedean screw is a device for raising water.
Archimedean solid is any of 13 solid figures with special properties.
Archimedes is a Greek mathematician and inventor, made some basic scientific discoveries.
Archipelago is a Greek word that means chief sea.
Architecture is a term with several meanings, all related to buildings.
Archives are collections of historical information.
Archon was the most important of the nine chief administrative officials of ancient Athens.
Arctic is the region of continuous cold around the North Pole.
Arctic Circle is an imaginary line that runs through the northern parts of Canada, Alaska, Russia, and Scandinavia.
Arctic fox is a small fox that lives in the barren, treeless regions surrounding the Arctic Ocean and on many islands in that sea.
Arctic tern is a sea bird often called the migration champion of the world.
Arcturus, also called Alpha Bootes, is the fourth brightest star in the night sky.
Ardennes Mountains and Forest extend from northern France into Belgium and Luxembourg.
Area, in plane geometry, is the amount of surface contained within the boundaries of a plane figure.
Arena was the area used for combat with beasts or between gladiators in an ancient Roman amphitheatre.
Areopagus was the oldest and most respected council of ancient Athens.
Ares was the god of war in Greek mythology.
Arethusa was a beautiful nymph in Greek mythology.
Arfon was a local government district bordering the Menai Strait in Gwynedd, North Wales.
Argentine ants are dark-brown ants about 2 millimetres long.
Argon, a chemical element, is a gas that forms 0.94 per cent of the earth’s atmosphere.
Argonaut is a sea animal of the same class as the octopus and squid.
Argonauts, in Greek mythology, were the companions of Jason, a famous hero.
Argus was a gigantic monster in Greek mythology.
Ariadne, in Greek mythology, was a daughter of Minos, king of Crete.
Arianism was an early Christian theological view taught by Arius, a priest of Alexandria, Egypt.
Aries is traditionally known as the first constellation of the zodiac.
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