Definition of improvisatrice in English:
improvisatrice
(also improvvisatrice)
noun ɪmˌprɒvɪzəˈtriːtʃeɪɪmˌprɒˌvɪzəˈtriːtʃi
A female poet who composes or performs verse extemporaneously; a female improvisatore.
Origin
Late 18th century; earliest use found in Charles Burney (1726–1814), musician and author. From Italian improvvisatrice, feminine form corresponding to improvvisatore: see -trice.