cu ‧ bit /ˈkjuːbət, ˈkjuːbɪt/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Latin ; Origin: cubitum 'elbow, cubit' ]
an ancient unit for measuring length, equal to the length of your arm between your wrist and your elbow
cu ‧ bit /ˈkjuːbət, ˈkjuːbɪt/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Latin ; Origin: cubitum 'elbow, cubit' ]
an ancient unit for measuring length, equal to the length of your arm between your wrist and your elbow
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012