Wordnet 3.0
ADJECTIVE (1)
1. 
 of or relating to or derived from axioms; 
- Example: "axiomatic physics"- Example: "the postulational method was applied to geometry"- S.S.Stevens[syn: axiomatic, axiomatical, postulational]
WordNet (r) 3.0 (2006):
postulational
    adj 1: of or relating to or derived from axioms; "axiomatic
           physics"; "the postulational method was applied to
           geometry"- S.S.Stevens [syn: axiomatic, axiomatical,
           postulational]