Definition of carboy noun from the Oxford Advanced Learner's Dictionary

 

carboy

 noun
noun
BrE BrE//ˈkɑːbɔɪ//
 
; NAmE NAmE//ˈkɑːrbɔɪ//
 
 
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a large round bottle, usually protected by an outer frame of wood and used for storing and transporting dangerous liquids Word Origin mid 18th cent.: from Persian qarāba ‘large glass flagon’.
See the Oxford Advanced American Dictionary entry: carboy