Source:http://linkedlifedata.com/resource/umls/id/C0439200
NCI: A measure of length in the metric system. A millimeter is one thousandth of a meter. There are 25 millimeters in an inch.,NCI: A unit of measure equal to one thousandth of a meter. (NCI),NCI: A metric unit of length equal to one thousandth of a meter (10E-3 meter) or approximately 0.03937 inch.