(‘tît hār) Noun. English (
American).
A universally accepted unit of measurement that is equal to 1/10,000th of the width of the
mark on your ruler that denotes a millimeter.
The tit-hair is a “Special” unit of measurement (akin to the pinch, dash, or
dab) that can be applied universally to both the Metric system and the “
American” system with no conversion factor. It can also be used with ANY measurement: distance, weight, volume, mass, density, temperature, etc., without a conversion factor.
Origin: approx 1948-1950 - Returning
GI’s from WWII had invented the term as they were fine tuning their weapons. From rifles to tanks to artillery - this is how it developed such universal adaptation.