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.

clean room

/ klēn /

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

An Americanism dating back to 1960–65

A bare enough room, certainly, not even a bit of carpet laid before the bed, but it was a clean room.

We were shown at once into a clean room, and were soon surrounded by bustle and preparation for our comfort.

Miss Joyce: A very respectable place, indeed, and a very clean room you will get.

After the disappointments of the day, welcome once more, Charles, to the comforts of a clean room and a good fire.

This fragrant, clean room bespoke character and family history.

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