Metastasian
/ˌmɛtəˈsteɪzɪən/ /ˌmɛtəˈsteɪʒn/ /ˌmɛtəˈsteɪʃn/Music
adjective
Of, relating to, or characteristic of the libretti of Pietro Metastasio, especially those written for heroic operas.
Origin
1940s; earliest use found in Alfred Einstein (1880–1952), musicologist. From the name of Pietro Metastasio, Italian poet and librettist + -an.