A unit of length equal to 10-3 microns (one thousandth of a micron), 10-6millimeters, or 10-9 meters; correctly called a manometer, nm.
MILLIMICRON (MILL-UH-MY-KRON)
Meaning of MILLIMICRON (MILL-UH-MY-KRON) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012