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Definition of Mount St. Helens in English English dictionary
- A stratovolcano in the US state of Washington
- Mount St Helens
- a volcano in Washington State in the northwestern US, which erupted in 1980 after a quiet period of over a hundred years, sending out ash (=powder produced when something has been burnt) and lava (=hot liquid rock) over a wide area. The large amount of ash in the air affected the weather in many northern parts of the world for some time
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Mount St. Helens
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mount st. Hel·ensResimler
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