Zarathustrianism

Etymology
, coined by Hermann Lommel and advanced by Ilya Gershevitch in the Hegelian dialectic view of Zoroastrianism in terms of thesis, antithesis, synthesis. In this construct, 'Zarathustrianism' is the thesis, 'Zarathustricism' is the antithesis, and 'Zoroastrianism' the synthesis.

Noun

 * 1)  Zoroaster's own doctrines as distinguished from later accretions (Zarathustricism, Zoroastrianism).