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1865, agent noun from verb nebulize "to reduce to a mist or spray" (1865), from Latin nebula "mist" (see nebula) + -ize. Related: Nebulization.
nebulizer neb·u·liz·er (něb'yə-lī'zər)n. A device used to reduce liquid to an extremely fine cloud, especially for delivering medication to the deep part of the respiratory tract.