sesquialtera

 
Pronunciation: /ˌsɛskwɪˈalt(ə)rə/

adjective

Music
  • relating to or denoting a ratio of 3:2, as in an interval of a fifth.
  • denoting a mixture stop in an organ, typically consisting of two ranks of narrow-scaled open flue pipes.

Origin:

late Middle English: from Latin, feminine of sesquialter, from sesqui (see sesqui-) + alter 'second'