the.com/micrometer
the tool that measures what your eyes will swear isn't even there
means A precision instrument for measuring very small distances, thicknesses, or diameters, typically to thousandths of a millimeter (and a name also used for the unit of one-millionth of a meter, the micron).
from Built from the Greek 'mikros,' meaning small, and 'metron,' meaning measure — a tidy compound that does exactly what it says. The word arrived in the 17th century alongside the early scientific obsession with measuring the previously unmeasurable; the same 'mikros' lurks in microscope, microbe, and microphone, all members of a family devoted to the very tiny.
- precision
- reads down to one thousandth of a millimeter
- old age
- screw-based design dates to the 1600s
- naval roots
- first patented to measure cannon bores
- the thimble
- its barrel uses a literal screw thread to count
- human hair
- measures it, then laughs at the comparison
mitutoyo micrometer — japanese precision instrument manufacturer founded 1934, standard in manufacturing worldwide
starrett outside micrometer — american precision tool brand established 1880, widely used for measuring external dimensions
depth micrometer — specialized variant for measuring hole and slot depths, common in machine shops since early 1900s