docimacy (n.)

also docimasy, "art or practice of assaying metals or separating them from foreign matter," 1776, from Latinized form of Greek dokimasia "assay, proving, examination" (especially, in ancient Athens, "judicial inquiry into the character of aspirants for office or citizenship"), from stem of dokimazein "to test, prove," from dokimos "proven, genuine," literally "accepted," related to dekhesthai "to take, accept," which is probably from PIE root *dek- "to take, accept." Related: Docimastic (1730).

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