Mid 17th century; earliest use found in John Selden (1584–1654), lawyer and historical and linguistic scholar. From post-classical Latin promotrix female promoter, feminine form corresponding to promotor: see -trix.
Definition of promotrix in US English:
promotrix
nounprəˈməʊtrɪks
rare
Promotress.
Origin
Mid 17th century; earliest use found in John Selden (1584–1654), lawyer and historical and linguistic scholar. From post-classical Latin promotrix female promoter, feminine form corresponding to promotor: see -trix.