decani Definition of the Latin term decani in music: the half of a church choir located on the dean's side in a church (opposite the cantoris) Language Latin Related terms Latin musical terms related to decani: cantoris – the half of a church choir located on the cantor’s...choragus – chorus leader (the person in charge of a chorus)choralis – connected to the choirchorus – chorus (large group of singers)coryphæus – leader of the chorus (in a Greek theatre)