Definitions for ultrashortˌʌl trəˈʃɔrt
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Random House Webster's College Dictionary
ul•tra•shortˌʌl trəˈʃɔrt(adj.)
extremely short, esp. in duration.
Category: Common Vocabulary
(of a wavelength) smaller than 10 meters.
Category: Radio and Television, Physics
Origin of ultrashort:
1925–30
Wiktionary
ultrashort(Noun)
A bond with an extremely short term, typically less than a year
ultrashort(Adjective)
Extremely short in duration, typically on the femtosecond scale
an ultrashort pulse
ultrashort(Adjective)
Having a wavelength of between 1 and 10 metree
ultrashort(Adjective)
Having a very short term of investment, typically less than a year
an ultrashort bond
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"ultrashort." Definitions.net. STANDS4 LLC, 2013. Web. 19 Jun 2013. <http://www.definitions.net/definition/ultrashort>.