sessional

adj

1. (not-comparable)Pertaining to a period, often an academic term or a sitting of a legislative body.

   “CUPE 3902 is a labour union local representing sessional lecturers and teaching assistants (TAs) at the University of Toronto, Canada.”

noun

1. An instructor hired by a college or universities on a temporary basis.

   “The sessionals’ Agreement was ratified on 1 April, 2005.”