ˌ ̷ ̷ ̷ ̷ˈdesəˌmō noun
( -s )
Etymology: Latin, abl. of duodecimus twelfth, from duodecim twelve
1. : twelvemo — symbol D ; see book tables
2.
[modification of Italian duodecima, from feminine of duodecimo twelfth, from Latin duodecimus, from duodecim twelve]
: the musical interval of a twelfth