Sinonim attosecond

English Thesaurus

1. one quintillionth (10^-18) of a second; one thousandth of a femtosecond (noun.time)

hypernym	:	time unit, unit of time,
definition	:	a unit for measuring time periods (noun.time)

part meronym	:	femtosecond,
definition	:	one quadrillionth (10^-15) of a second; one thousandth of a picosecond (noun.time)