bain-marie
Concise Oxford English Dictionary © 2008 Oxford University Press:
bain-marie /ˌbanməˈriː/
▶noun (pl. bains-marie or bain-maries pronunc. same) a pan of hot water in which a cooking container is placed for slow cooking.
– origin C18: Fr., translation of med. L. balneum Mariae ‘bath of Maria’, translating Gk kaminos Marias ‘furnace of Maria’, said to be a Jewish alchemist.
'bain-marie' also found in these Oxford entries:

