| Achaea |
an historic region of Greece along the northern coast of the Peloponnesus. [1/2 definitions] |
| Achaean |
of or pertaining to Achaea, a historic region of Greece along the northern coast of the Peloponnesus. [1/3 definitions] |
| Amazon |
a major river that flows from the Andes in Peru across northern Brazil to the Atlantic. [1/3 definitions] |
| Amazon River |
a major river that flows from the Andes in Peru across northern Brazil to the Atlantic. |
| Andromeda |
an autumn constellation in the northern sky, located between Perseus and Pegasus, with which it shares the bright triple star Alpheratz, and containing a spiral galaxy. [1/2 definitions] |
| Angles |
a people from the lowlands of northern Germany who migrated to eastern England in the fifth century. |
| anticyclone |
a large system of winds that rotates around a center of high barometric pressure, moving clockwise in the Northern Hemisphere and counterclockwise in the Southern, and usu. producing cool, dry weather. (Cf. cyclone.) |
| aoudad |
a wild sheep of northern Africa with long, thick, curved horns and long fringes of hair on the neck, chest, and forelegs. |
| Apache |
any member of a formerly nomadic North American Indian tribe chiefly inhabiting the southwestern United States and northern Mexico. [1/2 definitions] |
| Aquila |
a summer constellation in the northern sky, located between Lyra and Capricornus and the bright star Altair; Eagle. |
| Arawak |
a member of an Indian people once widespread throughout the West Indies, now living chiefly in northern South America. [1/2 definitions] |
| argali |
a wild sheep of central and northern Asia that has large spiraling horns. |
| Atacama |
a desert in northern Chile that lies between the Pacific Ocean and the Andes mountains. |
| Atacama Desert |
an extremely arid region of northern Chile that lies between the Pacific Ocean and the Andes mountains. |
| Atlas Mountains |
a range of mountains in northwest Africa stretching across the southwestern part of Morocco and northern parts of Algeria and Tunisia. |
| auk |
any of a group of web-footed, short-winged sea birds that live in colder parts of the Northern Hemisphere and are skilled at swimming and diving. |
| auklet |
any of several small auks of the northern Pacific coasts. |
| Auriga |
a winter constellation in the northern sky, located between Perseus and Gemini and containing the bright triple star Capella and several star clusters; Charioteer. |
| aurochs |
an extinct wild ox once common in northern Africa, Europe, and western Asia, and probably an ancestor of domestic cattle. [1/2 definitions] |
| aurora borealis |
the aurora of the Northern Hemisphere, seen esp. near the North Pole; northern lights. |
| autumn |
the season of the year between summer and winter, in the northern hemisphere continuing from the September equinox to the December solstice; fall. |