A thin sheet or layer of metal, possibly a variant spelling or archaic term for a small metal plate.
Possibly a diminutive or variant of amulet or plate, though direct etymology is uncertain; may relate to Middle English metalworking terminology.
Many metalworking terms we've lost track of—tinplate, wirework, sheetmetal—had precise meanings centuries ago; 'amlet' might be one of these forgotten craft words that once meant something specific to smiths.
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