from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A schematic group of twelve notes.
- n. A group of twelve.
from The Century Dictionary and Cyclopedia
- n. In musical theory, a group of twelve tones, having precise acoustical relations with one another, arranged so as to explain and correct problems in harmony and modulation.
From mediaeval Latin duodena ‘dozen’, from duodeni. (Wiktionary)