diṭṭhika : [adj.] (in cpds.), believing in; having the theory of.

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

Diṭṭhika (adj.) ( -- ˚) seeing, one who regards; one who has a view M iii.24 (āgamana˚ one who views the arrival, i. e. of guests); S ii.168 sq. (sammā˚ & micchā˚ hoḷding right & wrong theories); D iii.96 (vītimissa˚). See añña˚, micchā˚, sammā˚.

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