demijohn
noun /ˈdemidʒɒn/
/ˈdemidʒɑːn/
- a very large bottle with a narrow opening at the top, for holding and transporting water, wine, etc.Word Originmid 18th cent.: probably an alteration of French dame-jeanne ‘Lady Jane’, by association with demi- ‘half-sized’ and the given name John.