titthiya : [m.] a heretical teacher; and adherent of another religion.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Titthiya [from tittha 2, cp. Divy 817; AvŚ i.48; ii.20. An adherent of another sect (often as añña˚), an heretic Vin i.54, 84, 136, 159 (˚samādāna), 306 (˚dhaja), 320; S i.65; iv.37, 394; D iii.44, 46; Sn 381, 891; Nd2 38; Ps i.160; Pug 49; Vbh 247. añña˚ e. g. Vin i.101; D i.175 sq.; iii.130 sq.; J ii.415, 417. -- sāvaka a follower of an heretic teacher Vin i.172; J i.95; Vism 17.

Pali-English Dictionary, TW Rhys Davids, William Stede,