from The Century Dictionary and Cyclopedia
- n. See thiasus.
Sorry, no etymologies found.
Aeschines himself; and that his mother was priestess of a 'thiasos' or voluntary association of worshippers of Dionysus-Sabazios, among whose ceremonies was doubtless one symbolizing a marriage or mystical union between the god and his worshippers.
Burschenshaft, since the process of initiation necessarily implies the existence of some kind of thiasos ( 'company,' 'confraternity' or 'troupe') to which the initiate makes application and gains admission in order to share the experience of life-change. "
A term commonly applied to such an organization was thiasos, or “confraternity”; the language of brotherhood wasn’t, by itself, an innovation.
_thiasos_,  who was making a pilgrimage to gather information and organize societies.
Tertull. de præscr. 42: plerique nec Ecclesias habent), [Greek: thiasos] (Iren.