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English definition of “volcano”

volcano

noun [C]  /vɑlˈkeɪ·noʊ, vɔl-/ (plural volcanoes or volcanos) us  
a mountain made from burned materials that may throw out hot rocks and lava (= hot liquid rock) from a hole in its top
volcanic
adjective [not gradable]  /vɑlˈkæn·ɪk, vɔl-/ us  
volcanic ash/rock
(Definition of volcano from the Cambridge Academic Content Dictionary © Cambridge University Press)
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