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arctic (often cap.) of or pertaining to the geographic region encompassing the North Pole. [5 definitions]
Arctic Circle an imaginary line drawn around the earth parallel to the equator and south of the North Pole.
arctic fox a fox of arctic regions, whose fur is blue-gray or brownish gray in summer and white or light gray in winter.
Arctic Ocean an ocean that surrounds the North Pole.
Arcturus an orange star in the constellation Bo÷tes, having a magnitude of zero.
arcuate curved or bent like a bow; arched.
arcuated arcuate. [2 definitions]
arcuation the state of being curved, arched, or bent like a bow. [3 definitions]
arc welding a method of welding in which the extreme heat of an electric arc is used.
-ard one who often or excessively performs (such) an action or is in (such) a condition.
ardent having or characterized by very strong feelings such as passion, devotion, or desire; fervent. [2 definitions]
ardor very strong feelings; passion; fervor.
arduous entailing great difficulty, exertion, or endurance; laborious. [3 definitions]
are1 2nd person present sing. and 1st, 2nd, and 3rd person pl. of be.
are2 a unit of area equal to one hundred square meters or 119.6 square yards.
area a place or region. [4 definitions]
area code in the United States and Canada, any of the three-digit codes that identify the regional telephone districts into which the countries are divided. [2 definitions]
area rug a rug intended to cover only a specific section of a floor.
areaway a sunken area in front of basement doors or windows allowing access from outside, or permitting light and air to pass through. [2 definitions]
areca any of several tall palm trees of tropical Asia, such as the betel palm, having a smooth, slender trunk and feathery leaves and bearing red or orange nuts. [2 definitions]
arena a stage, ring, or other circumscribed area where sporting events or performances are held. [4 definitions]