Carthusian
noun
[ kɑːˈθjuːzɪən ]
• a monk or nun of an austere contemplative order founded by St Bruno in 1084.
Carthusian
adjective
• relating to the Carthusians.
Origin:
from medieval Latin Carthusianus, from Cart(h)usia, Latin name of Chartreuse, near Grenoble, where the order was founded.