vertical-axis propeller

vertical-axis propeller

[′vərd·ə·kəl ¦ak·səs prə′pel·ər]
(naval architecture)
A type of propeller wheel that consists of a circular horizontal disk set flush into a vessel's bottom, rotates about a vertical axis, and carries near its periphery a number of spadelike vertical blades.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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