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Related to cleanup: Disk Cleanup
Improving the external shape and smoothness of an aircraft to reduce its drag.
Gradual disappearance of gases from an electron tube during operation, due to absorption by getter material or the tube structure.
The time required for a leak-testing system to reduce its signal output to 37% of the signal transmitted at the instant when tracer gases enter the system.
The collecting of all the valuable product of a given period of operation in a stamp mill or in a hydraulic or placer mine.
The valuable material resulting from a cleanup.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.