Cistercian
Concise Oxford English Dictionary © 2008 Oxford University Press:
Cistercian /sɪˈstəːʃ(ə)n/
▶noun a monk or nun of an order that is a stricter branch of the Benedictines. ▶adjective relating to the Cistercians.
– origin from Fr. cistercien, from Cistercium, the L. name of Cîteaux near Dijon in France, where the order was founded.
'Cistercian' also found in these Oxford entries:

