The Collaborative International Dictionary of English v.0.48:
Nomothetic \Nom`o*thet"ic\, Nomothetical \Nom`o*thet"ic*al\, a. [Gr. ?.] Legislative; enacting laws; as, a nomothetical power. [R.] --Bp. Barlow. [1913 Webster]WordNet (r) 3.0 (2006):
nomothetic adj 1: relating to or involving the search for abstract universal principles [ant: idiographic]