Aerator

·add. ·noun That which supplies with air or gas.

II. Aerator ·add. ·noun A fumigator used to bleach grain, destroying fungi and insects.

III. Aerator ·add. ·noun An apparatus used for charging mineral waters with gas and in making soda water.

IV. Aerator ·noun That which supplies with air; ·esp. an apparatus used for charging mineral waters with gas and in making soda water.