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dispersion error[də′spər·zhən ‚er·ər]
Chance variation in a series of shots even though firing conditions are kept as constant as possible.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The distance between the point of aim and the point of impact.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved