polychoir en · ADJ
Etymology
From poly- + choir.
Meanings
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(not-comparable) Relating to more than one choir.
This literature includes the ensemble canzona, the ensemble sonata, the polychoir and single-choir ensemble sonatas […]
1962, Dissertation Abstracts, volume 22, number 4, page 3219:Among the conserved works of Anerio composed in Poland there are only the polychoir masses written in prima practica.
1996, Barok, volume 3, page 189: