humidifier

[ hyoo-mid-uh-fahy-er or, often, yoo- ]
/ hyuˈmɪd əˌfaɪ ər or, often, yu- /

noun

a device for increasing the amount of water vapor in the air of a room or building, consisting of a container for water and a vaporizer.
any device for regulating the amount of water vapor in a specific container or area.

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Origin of humidifier

First recorded in 1880–85; humidify + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for humidifier

humidifier
/ (hjuːˈmɪdɪˌfaɪə) /

noun

a device for increasing or controlling the water vapour in a room, building, etc
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