ultrashort

adjective

ul·​tra·​short ˌəl-trə-ˈshȯrt How to pronounce ultrashort (audio)
1
: having a wavelength below 10 meters
ultrashort radiation
2
: very short in duration
an ultrashort pulse of light

Examples of ultrashort in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Pico refers to the speed at which the laser fires, in a picosecond, delivering ultrashort energy pulses which are safe for all skin tones. — Amber Gibson, Glamour, 21 Oct. 2024 So how do physicists use these ultrashort pulses to make movies of electrons at the attosecond scale? — Niranjan Shivaram, The Conversation, 4 Oct. 2023

Word History

First Known Use

1926, in the meaning defined at sense 1

Time Traveler
The first known use of ultrashort was in 1926

Rhymes for ultrashort

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Cite this Entry

“Ultrashort.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrashort. Accessed 25 Mar. 2025.

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