Bisque firing is an initial firing at a low temperature to give a dry porcelain piece a certain amount of strength to facilitate further handling, especially underglaze printed decoration, before a final firing. Typical of Japanese porcelain.
Chinese potters did as a rule not use bisque firing before painting the final decoration. It is a possibility that some Chinese monochromes and susancai decorated porcelain was indeed bisque fired or similar to arrive at a harder body before final decoration.
In general any unglazed porcelain would be referred to as Biscuit. In Europe, Biscuit porcelain was used for making figures at the end of the 18th century and the beginning of the 19th century at the Sevres porcelain factory, Meissen and at the Derby porcelain factories in England. The French term for biscuit ware is, Bisque.