one thousandth of one millionth of a second (10-9 seconds)

listen to the pronunciation of one thousandth of one millionth of a second (10-9 seconds)
Английский Язык - Английский Язык

Определение one thousandth of one millionth of a second (10-9 seconds) в Английский Язык Английский Язык словарь

One thousandth of one millionth of a second (10-9 seconds)
nanosecond