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Meaning of radius rod

ra'dius rod"

Pronunciation: [key]
  1. (in a feathering paddle wheel) any of the rods, meeting in a hub mounted eccentrically with the paddle-wheel shaft, for feathering the paddles while in the water. See illus. under
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.