| Aqua-Lung |
trademark for an underwater breathing device similar to a scuba. |
| aquarium |
an artificial pond or container filled with water in which aquatic forms of life are kept. [2 definitions] |
| Aquarius |
an autumn zodiacal constellation located between Capricornus and Pisces; Water Bearer. [3 definitions] |
| aquatic |
of, in, or taking place on the water. [4 definitions] |
| aqueduct |
a channel built to convey water from a long distance. [2 definitions] |
| aquifer |
a bed of rock, sand, or gravel that can hold great quantities of water and supplies it to wells and springs. |
| -ar1 |
of or pertaining to. [2 definitions] |
| AR |
abbreviation of "Arkansas," a south central U.S. state between Mississippi and Oklahoma. |
| Arab |
a member of the Semitic people that originated in Arabia and now forms the dominant population in that and other Middle Eastern countries. [4 definitions] |
| Arabia |
a Southwest Asian peninsula between the Red Sea and the Persian Gulf. |
| Arabian |
of, pertaining to, originating in, or characteristic of Arabia or its desert climate. [4 definitions] |
| Arabian Desert |
a very arid region occupying a large portion of the Arabian Peninsula and stretching into Jordan and Iraq. |
| Arabian Peninsula |
a peninsula in western Asia that lies between the Red Sea to the west and the Persian Gulf to the northeast. The Indian Ocean borders the Arabian Peninsula on the southeast. Countries located on the peninsula include Saudi Arabia, Yemen, Oman, United Arab Emirates, Qatar, Bahrain, and Kuwait. |
| Arabian Sea |
an extension of the Indian Ocean between India and the Arabian Peninsula. |
| Arabic |
designating, pertaining to, or in the script used to write the Semitic language of the Arabs, or Persian, Urdu, and other languages. [3 definitions] |
| Arabic numeral |
any of the symbols for the numbers one through nine, including zero; 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. |
| arable |
of land, capable of yielding crops when cultivated. [2 definitions] |
| Aral Sea |
formerly, a very large, single lake in Central Asia. Once one of the world's largest lakes, the Aral Sea has vastly diminished in volume of water and has divided into separate parts as a result of the diversion, for agricultural purposes, of the rivers that fed the lake. The southeastern part of the Aral Sea has become entirely dry. |
| arbitrary |
resulting from whim or caprice instead of from a rule or reason. [3 definitions] |
| arbitrate |
to decide as an arbiter. [4 definitions] |
| arbor1 |
an arrangement of trees, vines, shrubs, or flowers, often supported by a lattice framework and forming a shady bower or shelter. |