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Based on historic texts, the inch was 1st acknowledged within the 7th century as a way of assessing wound depth. Its 1st Formal definition dates from 1324 – 3 grains of barley, dry and round, put conclusion to end, lengthwiseHistory/origin: The term "inch" was derived with the Latin unit "uncia" which equated to "a single-twelfth" of the Roman fo