rotary(redirected from rotaries)
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1. a part of a machine that rotates about an axis
2. US and Canadian another term for roundabout (for traffic)
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A rotary machine, such as a rotary printing press or a rotary well-drilling machine.
The turntable and its supporting and rotating assembly in a well-drilling machine.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.