volcano
Concise Oxford English Dictionary © 2008 Oxford University Press:
volcano/vɒlˈkeɪnəʊ/
▶noun (pl. volcanoes or volcanos) a mountain or hill having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust.
– origin C17: from Ital., from L. Volcanus ‘Vulcan’, the Roman god of fire.
'volcano' also found in these Oxford entries:

