noun
- a unit of length equal to one thousandth of a meter
Usage: metric system
Examples
- The pencil lead is 0.5 millimeters thick.
- Rainfall was measured at 15 millimeters yesterday.
- The doctor said the tumor was only 2 millimeters in diameter.
- This screw requires a 3-millimeter Allen wrench.
- The paper is 0.1 millimeters thick.
- Snow accumulated to a depth of 50 millimeters.