Definition of thumbwheel in English:

thumbwheel

Syllabification: thumb·wheel
Pronunciation: /ˈTHəmˌ(h)wēl
 
/

noun

  • A control device for electrical or mechanical equipment in the form of a wheel operated with the thumb.
    More example sentences
    • You can also use a thumbwheel to toggle between programs or launch new ones.
    • The monochrome screen is easy to read, and the clickable thumbwheel control permits scrolling through programming and feature menus readily enough.
    • But the thumbwheel makes you feel like you're in control.

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Word of the day milord
Pronunciation: məˈlôrd
noun
used to address an English nobleman