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volcanic glass a natural glass produced by the rapid cooling of lava, such as obsidian or pitchstone.
volcanism the force, activity, or phenomena associated with volcanoes.
volcano a vent in the earth's crust through which molten rock, ash, gases, and the like are expelled. [2 definitions]
volcanologist one who studies or works professionally in the field of volcanology.
volcanology the scientific study of volcanic phenomena.
vole any of several small rodents similar to mice but having short limbs and tails.
Volga a major river, the longest in Europe, flowing through central Russia and emptying into the Caspian Sea.
Volga River a major river, the longest in Europe, flowing through central Russia and emptying into the Caspian Sea.
volition the act of willing, deciding, or choosing. [2 definitions]
volitive of, relating to, or arising from the will. [2 definitions]
volley a simultaneous discharge of firearms or other weapons. [7 definitions]
volleyball a court game in which two teams hit a large inflated ball back and forth over a high net, and in which points are scored for grounding a ball in the opponent's court. [2 definitions]
volplane to glide in or as if in an airplane with the engine turned off. [2 definitions]
Volstead Act an act of Congress passed in 1919 and repealed in 1933, enforcing the Eighteenth Amendment to the U.S. Constitution and forbidding the sale of alcoholic beverages.
volt1 a unit of electromotive force equal to the force that carries one ampere of current through one ohm resistance. (abbr.: V)
volt2 an equestrian maneuver in which the horse moves sideways around a center. [2 definitions]
voltage electromotive force or potential difference, measured in volts.
voltaic of or pertaining to electricity that is produced by chemical action; galvanic.
voltaic battery a battery that consists of one or more voltaic cells.
voltaic cell a cell that contains two plates, or electrodes, of different metals which are immersed in an electrolyte solution, and in which an irreversible chemical reaction produces an electric current.
Voltaire a French author and philosopher; François Marie Arouet (1694-1778).