sodium hydroxide (NaOH), a strong alkaline substance used in the manufacture of paint, soap and detergents, or as a drain cleaner.
A sample taken with a swab (piece of absorbent material).
A sailor; a swabby.
A naval officer's epaulet.
A small piece of soft, absorbent material, such as gauze, used to clean wounds, apply medicine, or take samples of body fluids. Often attached to a stick or wire to aid access.
A mop, especially on a ship.
A piece of material used for cleaning or sampling other items like musical instruments or guns.
To use a swab on something, or clean something with a swab.