clean room
clean room
1960–65, Americanism
Based on the Random House Dictionary, © Random House, Inc. 2012.
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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
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. |
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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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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