Definitions from Wiktionary ( )

▸ noun:  (medicine) 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.
▸ noun:  A sample taken with a swab (piece of absorbent material).
▸ noun:  A piece of material used for cleaning or sampling other items like musical instruments or guns.
▸ noun:  A mop, especially on a ship.
▸ noun:  (slang) A sailor; a swabby.
▸ noun:  (slang) A naval officer's epaulet.
▸ verb:  (transitive) To use a swab on something, or clean something with a swab.
▸ noun:  A surname.

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