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Gazogene, gaz′o-jēn, n. an instrument for manufacturing aerated waters, usually for domestic use, by the action of an acid on an alkali carbonate.

This should be washed before it is used again for filling the gazogene.

Pamela, who had not a notion what a gazogene was, gasped the required surprise and horror and said, "But how did she do it?" which was the safest remark she could think of.

"Robina," said Miss Teenie gloomily, "could break a steam-roller let alone a gazogene."