Definitions
from The Century Dictionary.
- noun A form of turbine water-wheel, in which the passages for the water and the buckets have a shape approximating that of a spiral or scroll.
- noun A cog-wheel in the form of a scroll, the effect of which is to cause the gearing to rotate more slowly when engaged with its main parts than when it is working in the outer parts.
Etymologies
Sorry, no etymologies found.
Support

Help support Wordnik (and make this page ad-free) by adopting the word scroll-wheel.
Examples
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Is that both a scroll-wheel on the front and a trackball on the side (facing away from us, but you can sort of see a little bump)?
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I also do the RIGHT click and hold scroll-wheel thing to get a context sensitive history list you can scroll through.
Use The Scroll Wheel To Zip Through Your Browser History | Lifehacker Australia 2009
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Thanks to incorrect, too, for giving my scroll-wheel finger a little extra workout while I read through comments.
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Vudu's biggest strengths are its easy setup, good picture quality and simple user interface, easily navigated using a scroll-wheel remote control.
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Just click on the tab with your scroll-wheel button. otto Van De Steene
Firefox vs. Safari 2005
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The browser that I'm using, Firefox, has this feature I'm not sure I understand yet; if you click on a web page using the scroll-wheel button, it takes you to another page that it somehow figures is related to the first.
married in mexico 2004
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The device has an unusual circular scroll-wheel that lets users search through their music library by playlist, artist, or genre.
Apple's 'Breakthrough' iPod Brad King Farhad Manjoo 2001
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The iPod Classic, as the famous scroll-wheel design is now known, hasn't been updated now since September 2009, with a modest capacity jump from 120GB to 160GB.
The Guardian World News Johnny Davis 2011
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If you point at the corner and use the scroll-wheel on your mouse, a menu listing all of the actions available will be shown and will allow you to select from them.
MacUpdate - Mac OS X 2010
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If you point at the corner and use the scroll-wheel on your mouse, a menu listing all of the actions available will be shown and will allow you to select from them.
MacUpdate - Mac OS X 2010
Comments
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