Assertion: micron | /r/HasProperty | a thousandth of a millimetre
Facets:
Source sentences:
text: As one spacecraft lurches and drags through the Earth's uneven gravity field, the second follows 210 km behind, measuring changes in their separation to the nearest micron (a thousandth of a millimetre).
text: It is another name for "micrometer," which is one thousandth of a millimeter, or one millionth of a meter.