Webster's English Dictionary

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volcano

vol.ca.no \va:l-'ka--(.)no-, vo.l-\ n or volcanoes or volcanos [It volcano, 
   fr. L Volcanus, Vulcanus Vulcan] pl  1: a vent in the earth's crust from 
   which molten or hot rock and steam issu e 2: a hill or mountain composed 
   wholly or in part of the ejected material