metric ton(unit of mass equal to 1000 kilograms) noun [UK: ˈme.trɪk tʌn] [US: ˈme.trɪk ˈtən]
ton [tons](unit of weight) noun [UK: tʌn] [US: ˈtən]
tonne [tonnes](1000 kilograms) noun [UK: tʌn] [US: ˈtən]We'd like to order 18 tonnes of olive oil. = Vorremmo ordinare diciotto tonnellate di olio d'oliva.