Relating to or denoting a system of counting or numerical notation that has twelve as a base.
- ‘The duodecimal calendar has survived since Babylonian times for a reason.’
- ‘In a duodecimal system (base twelve) why are letters sometimes used instead of numbers?’
- ‘The regime didn't like the 12-base, or duodecimal, calendar (inherited from antiquity and early Christianity), so it tried to impose a decimal calendar.’
The system of duodecimal notation.
- ‘Base 11 is called undenary, Base 12 is called duodenary or duodecimal, Base 16 is called hexadecimal.’
Late 17th century: from Latin duodecimus ‘twelfth’ (from duodecim ‘twelve’) + -al.
We take a look at several popular, though confusing, punctuation marks.