clean room

noun
a room in which contaminants such as dust are reduced to a very low level by special procedures so that operations such as the manufacture and assembly of delicate equipment or the manipulation of biological materials can be performed effectively.

Origin:
1960–65, Americanism

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
clean room   (klēn)  Pronunciation Key 
A room that is maintained free of contaminants, such as dust or bacteria. Clean rooms are used in laboratory work and in the production of precision parts for electronic or aerospace equipment. Also called white room.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

clean room

in manufacturing and research, dust-free working area with strict temperature and humidity control that is of vital importance in the manufacture of equipment sensitive to environmental contamination, such as components for electronic and aerospace systems. Seamless plastic walls and ceilings, rounded corners, external lighting and wiring, a continuous influx of dust-free air, and daily cleaning are characteristic features. Clean-room workers wear special clothing, including head coverings, and, on entering, pass through an air blast, or air shower, to remove particles. Workpieces for assembly enter through an airlock.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Semiconductor companies could use it to move chips in a clean room without scratching them.
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