What does "payndemain" mean?

Payndemain: The finest and whitest bread made in the Middle Ages; -- called also paynemain, payman. [Obs.] PAYNE'S PROCESS Payne's process. A process for preserving timber and rendering it incombustible by impregnating it successively with solutions of sulphate of iron and calcium chloride in vacuo. --Payn"ize, v. t.

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