| 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] |
| arenaceous |
sandy or sandlike. [2 definitions] |
| arena theater |
a theater that has a central stage surrounded on at least three sides by seats. |
| arenicolous |
living or growing in sand. |
| arenite |
sandstone or other rock that is composed chiefly of grains of sand. |
| aren't |
contracted form of "are not," or contracted form of "am not" used in questions. |
| areola |
in anatomy, a small ring of color, as around a human nipple. [2 definitions] |
| Ares |
in Greek mythology, the god of war; Mars. |
| arête |
a sharp, narrow ridge or crest on a mountain. |
| argali |
a wild sheep of central and northern Asia that has large spiraling horns. |
| Argand burner |
an oil or gas burner having a metal tube inside a cylindrical wick, through which air is conducted directly to the flame. |
| argent |
in heraldry, the metal silver or its color. [2 definitions] |
| argentic |
of or containing silver, esp. divalent silver. |