whistle

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whis·tle

(wis'ĕl),
1. A sound made by forcing air through a narrow opening such as pursed lips.
2. An instrument for producing a whistle.
[A.S. hwistle]
Farlex Partner Medical Dictionary © Farlex 2012

whistle

(hwĭs′ĕl)
1. A sound produced by pursing one's lips and blowing.
2. A tubular device driven by wind that produces a loud and usually shrill sound.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Owner Simon Topman said: "We normally make millions of whistles for pounds 3.99, so it is completely different for us to sell a whistle for pounds 2000."
This week, we look at the city's first police-issue whistles BIRMINGHAM'S legendary whistle-making industry led to a local company being selected to produce the official whistles for the city's early police force and numerous others worldwide.
The company, which made whistles for the Titanic, first began producing the Metropolitan for the police in London in 1884.