The ninth variety of Prāyaścitta (expiation); the expiation, in which the expiator is dispelled from the Saṃgha (ascetic order) for a definite period of time, and then is re-initiated by conferring the vows, preceded by undertaking a prescribed course of penance (fasting).
yasminnāsevite kañcana kālaṃ vrateṣvanavasthāpyaṃ kṛtvā paścāccīrṇatapāstaddoṣoparato vrateṣu sthāpyate tadanavasthāpyaḥ.
(Sthā 10.73 Vṛ Pa 461)