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fumatorium
(fyo͞oˌmə-tôrˈē-əm, -tōrˈ-)
noun pl. fu·ma·to·ri·ums or fu·ma·to·ri·a (-tôrˈē-ə, -tōrˈ-) An airtight fumigation chamber in which chemical vapors are used to destroy insects and fungi on plants. Also called fumatory.