bain-marie
noun
bain-ma·rie ˌban-mə-ˈrē 
ˌbaⁿ-
plural bains-marie ˌban-mə-ˈrē
ˌbaⁿ-
: a cooking utensil containing heated water in which food in smaller pots is cooked compare double boiler
Word History
Etymology
French, from Middle French, translation of Medieval Latin balneum Mariae, literally, Mary's bath, after Maria Hebraea, Mary the Jewess, legendary inventor of apparatus used in alchemy
First Known Use
1723, in the meaning defined above