ultrashort

1. informalnot comparableengineeringVery short.

   ultrashort skirts

   Synonyms: megashort

2. not comparablesciencesExtremely short in duration, typically on the femtosecond scale

   an ultrashort pulse

3. not comparablenatural sciencesHaving a wavelength of between 1 and 10 metres
4. not comparablebusinessHaving a very short term of investment, typically less than a year

   an ultrashort bond

plural ultrashorts

1. businessA bond with an extremely short term, typically less than a year

   Ultrashorts were a way for the fund industry to appeal to bank customers, by offering an investment whose price did not vary much but whose yield was higher than that on certificates of deposit.

   1995 February 19, Carole Gould, “Mutual Funds: Ultrashort but Long on Choices”, in The New York Times