Search nanosecond (ns) nanosecond (ns) /nan″əsek′ənd/ [Gk, nanos, dwarf; L, secundus, second] , one billionth (10−9) of a second. Tweet Telegram VK Random Words negative staining inorganic phosphorus agalsidase beta arachnoidism Agent Orange papula ambulatory anesthesia obliteration Purkinje’s network