A prefix meaning one-millionth (1/1,000,000 or 10-6)
Examples:
• a micrometer is one-millionth of a meter, which is about the size of a small bacterium!
• a microsecond is one-millionth of a second
Symbol is µ
Example: 12 µm = 12 micrometers = 12 millionths of a meter (0.000012 m)
