Seriatim
In modern use pleadings is used for "one by one in sequence".  For example, in English civil cases, defence statements generally used to conclude with the phrase "save as expressly admitted herein, each allegation of the plaintiffs is denied as if set out in full and traversed herein seriatim." This formulation is now discouraged under the English Civil Procedure Rules, especially rule 16.5 (3)-(5).