dodecuplet

\\dōˈdekyəplə̇t, -ˌplet\ noun (-s)

Etymology: dodeca- + -uplet (as in octuplet)

: 12 musical notes performed in the time of the same value

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doˈdecuplet Mus.

[f. dodeca- + ending of octuplet, etc.]

‘A group of twelve notes to be played in the time of eight’ (Stainer and Barrett Dict. Mus. Terms 1880).