What is Courts Of Assize And Nisi Prius?

Legal Definition
Courts in England composed of two or more commissioners, called "judges of assize," (or of "assize and nisi prius") who are twice in every year sent by the king's special commission, on circuits all round the kingdom, to try, by a jury of the respective counties, the truth of such matters of fact as are there under dispute in the courts of Westminster Hall. 3 Steph. Comm. 421, 422 ; 3 Bl. Comm. 57.
-- Black's Law Dictionary
Legal Definition
Same as Court of nisi prius.
-- Ballentine's Law Dictionary