Aerator

noun

Definitions

Noun
  1. 1
    A device which mixes air with a substance, particularly soil or a liquid.

    "faucet aerator"

  2. 2
    an apparatus for exposing something to the air (as sewage) wordnet
  3. 3
    A device used for charging mineral waters with gas and in making soda water.
  4. 4
    A fumigator used to bleach grain, destroying fungi and insects.

Etymology

From aerate + -or.

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