septendecimal

== English == === Etymology 1 === From Latin septendecim (“seventeen”) +‎ -al, after decimal. By surface analysis, septen- +‎ decimal. ==== Adjective ==== septendecimal (not comparable) Relating to or based on the number 17. === Etymology 2 === From Latin septendecimus +‎ -al (after English seventeenth and decimal), from septendecim (“seventeen”), after decimus (“tenth”). Compare Latin septimusdecimus (“seventeenth”). By surface analysis, septen- +‎ decimal. Coined by English mathematician, philologist and musician Alexander John Ellis in 1885 (see the quotation). ==== Adjective ==== septendecimal (not comparable) (music) Of or relating to a seventeenth. ==== References ====