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ultrashort

adjective
ul·​tra·​short | \ ˌəl-trə-ˈshȯrt How to pronounce ultrashort (audio) \

Definition of ultrashort

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

 Assets in mutual and exchange-traded funds that buy ultrashort-term debt rose to a record $174 billion in April, and inflows are near all-time highs, according to Morningstar. — Daniel Kruger, WSJ, "Bond Investors Pour Into Short-Term Funds," 9 May 2018

First Known Use of ultrashort

1926, in the meaning defined at sense 1

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