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- DictionaryGey·ser/ˈɡīzər/
noun
- 1. a hot spring in which water intermittently boils, sending a tall column of water and steam into the air.
- 2. a gas-fired water heater through which water flows as it is rapidly heated. British
verb
- 1. (especially of water or steam) gush or burst out with great force: "yellow smoke geysered upward"