MICROMETER by Metro Digital Resources Librarian • April 14, 2016 A unit of measure equal to one millionth of a meter (one thousandth of a millimeter). Airborne particulate matter is measured in micrometers to help determine its level of threat to human respiratory health. Share:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to email this to a friend (Opens in new window)Click to print (Opens in new window)Like this:Like Loading... Related