'Scrubber' definitions:

Definition of 'scrubber'

noun

A worker who uses a scrub brush to clean a surface (usually a floor or deck)

noun

A brush with short stiff bristles for heavy cleaning [syn: scrub brush, scrubbing brush, scrubber]

noun

A purifier that removes impurities from a gas

From: GCIDE

Scrubber \Scrub"ber\ (skr[u^]b"b[~e]r), n.
1. One who, or that which, scrubs; esp., a brush or machine used in scrubbing. [1913 Webster +PJC]
2. (Gas Manuf.) A gas washer. See under Gas. [1913 Webster]
3. (Manufacturing) a device for removing pollutants from a gas stream, especially for removing sulfur oxides from processes burning coal or oil. [PJC]

From: GCIDE

Scrubber \Scrub"ber\ (skr[u^]b"b[~e]r), n.
1. a stunted or emaciated steer. [PJC]
2. A person who lives in the bush. [Australian] [PJC]
3. A domesticated animal which has escaped and lives wild in the bush. [Australian] [PJC]