皮秒

皮秒	pí miǎo	picosecond, ps, 10^-12 s
皮	Pí	surname Pi
皮	pí	leather / skin / fur / CL:张 / pico- (one trillionth) / naughty
秒	miǎo	second (unit of time) / arc second (angular measurement unit) / (coll.) instantly