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.
Direct Questions vs. Reported DialogueA direct question is when you ask a question by speaking directly (e.g. “How are you doing today?”). Reported dialogue is when you report what someone else says (e.g. “Joan asked how you’re doing today.”). Reported dialogue usually uses the third person point of view. Direct Questions Direct questions usually include interrogative pronouns or adverbs. Interrogative pronouns and adverbs include words like as who, what, …
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Origin of clean room
An Americanism dating back to 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for 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
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.