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umpire assay

noun

: an assay to decide the value of a shipment (as of ore, concentrate, bullion) when previous assays made by the buyer and seller are not in agreement

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“Umpire assay.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/umpire%20assay. Accessed 30 Nov. 2025.

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