wind sail

[ wind ]
/ wɪnd /

noun Nautical.

a sail rigged over a hatchway, ventilator, or the like, to divert moving air downward into the vessel.

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Origin of wind sail

First recorded in 1715–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for wind sail

British Dictionary definitions for wind sail

windsail
/ (ˈwɪndˌseɪl) /

noun

a sail rigged as an air scoop over a hatch or companionway to catch breezes and divert them below
any of the vanes or sails of a windmill
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012