Dictionary.com
Thesaurus.com

Assidean

American  
[as-i-dee-uhn] / ˌæs ɪˈdi ən /
Also Assidaean,

noun

Judaism.
  1. a member of a sect, characterized by its religious zeal and piety, that flourished in the 2nd century b.c. during the time of the Maccabees and vigorously resisted the Hellenization of Jewish culture and religion.


Etymology

Origin of Assidean

1605–15; < Greek Assidaî ( oi ) (plural) (< Hebrew hasīdhīm pious ones; Hasid ) + -an