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-ar2 one that acts as an agent or performs.
Ar symbol of the chemical element argon.
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]
arabesque a complex design of interlaced scrolls, foliage, and other fanciful shapes, or an ornamental object having such a design. [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 camel the single-humped camel native to the area from North Africa to India; dromedary. (Cf. Bactrian camel.)
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]
Arab League a confederation of nations sharing a common Arabic language and culture, formed in 1945 to promote economic, military, and political cooperation among its members, and now grown to a total of twenty-one.
Arab Republic of Egypt see Egypt.
arachibutyrophobia the persistent fear of or intense distress caused by peanut butter sticking to the roof of one's mouth.
arachidonic acid an unsaturated fatty acid that is an important component of the cell membrane and is considered an essential nutrient in the diet of most mammals, including humans.
arachnid an arthropod having four pairs of legs and belonging to the class that includes scorpions, ticks, and spiders.
arachnoid an arachnid. [5 definitions]
arachnophobia an irrational fear of spiders.