Macrometer vs. Micrometer
Difference Between Macrometer and Micrometer
An instrument for determining the size or distance of inaccessible objects by means of two reflectors on a common sextant
An SI/MKS unit of measure, the length of one millionth of a meter. Symbols: µm, um, rm.
A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter.
caliper for measuring small distances
a metric unit of length equal to one millionth of a meter