Artificial intelligent assistant

assay-master

aˈssay-ˌmaster
  [see assay n.]
  The master of an assay-house; an officer appointed to assay coin, gold and silver plate, etc.

1647 Haward Crown Rev. 22 Assay Master: Fee, 100m. 1662 Petty Taxes & Contr. 26 Reports of the ablest Saymasters. 1692 Luttrell Brief Rel. II. 623 Sir John Brattle, essay master of the mint, is dead. 1701 Lond. Gaz. No. 3714/1 An Act for appointing Wardens and Assay-Masters, for Assaying Wrought Plate. 1784 C. Burney in Parr's Wks. (1828) VII. 394 You, who are my Assay Master, and separate my dross from the sterling ore.

Oxford English Dictionary

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