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Definition of: volcano
(vol·kā′nō) noun plural ·noes or ·nos Geol.
An opening in the earth's surface surrounded by an accumulation of ejected material, forming a hill or mountain, from which heated matter is or has been ejected: known in the former case as active, and in the latter as dormant or extinct. [<Ital. <L Volcanus, Vulcanus Vulcan]
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