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steam boiler

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noun

a receptacle in which water is boiled to generate steam.

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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Origin of steam boiler

First recorded in 1795–1805
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for steam boiler

steam-boiler

noun

a vessel in which water is boiled to generate steam. An industrial boiler usually consists of a system of parallel tubes through which water passes, suspended above a furnace
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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