from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Nautical A torpedo-shaped instrument with rotary fins that is dragged from the stern of a vessel to measure the speed or distance traveled. Also called screw log, taffrail log.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A taffrail log

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a cigar-shaped log with rotary fins that measure the ship's speed


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