| ̷ ̷ ̷ ̷|lāshən ə l, -shnəl adjective
: of, relating to, or involving the use of postulates
science is a postulational system — C.I.Glicksberg
specifically : depending on a set of mathematical postulates
the postulational method was applied to geometry — S.S.Stevens
• pos·tu·la·tion·al·ly - ə l]ē, -əl], ]i\ adverb