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protoporcelain

noun pro·to·porcelain \ ¦prōt(ˌ)ō+ \
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Definition of protoporcelain

: a porcelaneous ware lacking some of the qualities of a true porcelain; specifically : a hard-fired gray kaolinic Chinese stoneware known since the Han dynasty

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Origin and Etymology of protoporcelain

prot- + porcelain; probably translation of German urporzellan

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