taffrail log


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taffrail log

n.
See patent log.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.taffrail log - a cigar-shaped log with rotary fins that measure the ship's speedtaffrail log - a cigar-shaped log with rotary fins that measure the ship's speed
patent log, screw log
log - measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ship's speed through the water
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