सिद्धान्त [ siddhānta ] [ siddhānta ] m. established end , final end or aim or purpose ( cf. [ sama-s ] ) , ( cf. [ rāddhānta ] ) , demonstrated conclusion of an argument ( or the 4th member of a syllogism following on the refutation of the [ pūrva-pakṣa ] q.v.) , settled opinion or doctrine , dogma , axiom , received or admitted truth ( of four kinds see [ sarva-tantra-s ] ? , [ prati-tantra-s ] , [ adhikaraṇa-s ] , [ abhyupagama-s ] ) Lit. MBh. Lit. Kap. Lit. Sarvad. ( cf. Lit. IW. 64)

  any fixed or established or canonical text-book or received scientific treatise on any subject (esp. on astronomy and mathematics ; often ifc. , as the following 9 , Brahma-siddhânta , Sūrya-siddhânta , Soma-siddhânta , Bṛihaspati-siddhânta , Garga-siddhânta , Nārada-siddhânta , Parāśara-siddhânta , Pulastya-siddhânta , Vasishṭha-siddhânta ; or the following 5 , Siddhântas , Pauliśa-siddhânta , Romaka-siddhânta , Vāsishṭha-siddhânta , Śaura-siddhânta , and Paitāmaha-siddhânta) Lit. VarBṛS. Lit. Sarvad. Lit. IW. 175

  a partic. class of Buddhist and Jaina works.