Definitions for ultrashortˌʌl trəˈʃɔrt
Random House Webster's College Dictionary
extremely short, esp. in duration.
Category: Common Vocabulary
(of a wavelength) smaller than 10 meters.
Category: Radio and Television, Physics
Origin of ultrashort:
A bond with an extremely short term, typically less than a year
Extremely short in duration, typically on the femtosecond scale
an ultrashort pulse
Having a wavelength of between 1 and 10 metree
Having a very short term of investment, typically less than a year
an ultrashort bond