A prefix meaning one-billionth (1/1,000,000,000 or 10-9)
Examples:
• a nanometer is one-billionth of a meter, about the width of DNA (illustrated here)
• a nanosecond is one-billionth of a second
Symbol is n
Example: 12 ns = 12 nanoseconds = 12 billionths of a second (0.000000012 s)
