微米

micron (one thousandth of a millimeter or 10^-6 meter)

rice / CL:粒[li4] / meter (classifier)

surname Wei / ancient Chinese state near present day Chongqing / Taiwan pr. [Wei2]

tiny / miniature / slightly / profound / abtruse / to decline / one millionth part of / micro- / Taiwan pr. [wei2]

millimicron or one-millionth of a millimeter