We found 2 dictionaries that define the word zarathustras:

General (2 matching dictionaries)

1. Zarathustras: Vocabulary.com
2. Zarathustra's: Wordnik

(Note: See zarathustra as well.)

Definitions from Wiktionary (Zarathustra) ▸ noun:  Synonym of Zoroaster. ▸ Also see zarathustra ▸ Words similar to zarathustras ▸ Usage examples for zarathustras ▸ Idioms related to zarathustras ▸ Wikipedia articles (New!) ▸ Popular adjectives describing zarathustras ▸ Words that often appear near zarathustras ▸ Rhymes of zarathustras ▸ Invented words related to zarathustras