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three-way bulb

American  
[three-wey] / ˈθriˌweɪ /

noun

  1. a light bulb that can be switched to three successive degrees of illumination.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

If they are not available, “a three-way bulb works nicely to control the level of light in a space,” Underwood says.

From Seattle Times

And if your lamp has a three-way bulb, be sure to buy a replacement socket of the same style.

From Washington Post