Pariyatti: 'learning the doctrine', the 'wording of the doctrine'. In the 'progress of the disciple', 3 stages may be distinguished: theory, practice, realization, i.e. 1 learning the wording of the doctrine pariyatti 2 practising it patipatti 3 penetrating it pativedha and realising its goal.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.