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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 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.
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.
arak see arrack.
Aramaic the Semitic language of ancient Syria, Palestine, and Southwest Asia. [3 definitions]
Arapaho a member of a North American Indian tribe that formerly lived in the western plains from Texas and New Mexico to Canada, and now lives in Oklahoma and Wyoming. [2 definitions]