mensuralist
/ˈmɛnʃ(ʊ)rəlɪst/ /ˈmɛnʃ(ʊ)r(ə)lɪst/ /ˈmɛnsjʊrəlɪst/Music
noun
A composer or advocate of mensural music, especially an advocate of the performance of plainsong in notes of fixed duration.
adjective
Of or relating to mensural music or mensuralists.
Origin
Early 20th century. From French mensuraliste from classical Latin mēnsurālis + French -iste.