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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". ; contracted form of "am not".
areola in anatomy, a small ring of color, as around a human nipple. [2 definitions]
Ares in Greek mythology, the god of war; Mars.
arÍte 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.
argentiferous containing or yielding silver.
Argentina a country in the southern part of South America, between Chile and Uruguay.
Argentine a person who was born or lives in Argentina; Argentinean. [2 definitions]
argentine of or resembling silver.
argentous of or containing univalent silver.
argillaceous of or containing clay or its components.
arginine an amino acid found in most proteins that is essential in the human diet.
Argo (italics) in Greek mythology, the ship used by Jason in his search for the Golden Fleece.
argon a chemical element of the inert gas group that has eighteen protons in each nucleus. (symbol: Ar)
Argonaut in Greek mythology, any of the crew of the Argo, who sailed with Jason in search of the Golden Fleece.