atomo [Italian]

In Milan, Italy, 17th – 19th centuries, a small unit of length. As 1/10,368th of a trabucco, it was about 252 micrometers. As 1/1728 of the baraccio, it was about 344 micrometers. chart symbol

In the metrication effort of 1803 “atomo” was adopted as the name of the millimeter in Milan.

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