Relating to the number seven.
- ‘Here is an example of a septimal clock, placed next to a standard sexagesimal clock for comparison.’
- ‘While the septimal system of calculation can be mapped onto the decimal, no comparable mapping of Aristotelian onto Platonic categories is possible.’
Mid 19th century: from Latin septimus seventh (from septem seven) + -al.
We take a look at several popular, though confusing, punctuation marks.