Late 19th century; earliest use found in John Lubbock (1834–1913), banker, politician, and scientific writer. From protero- + -gynous, after German protogynisch. Compare earlier protogynous and proterandrous.
Definition of proterogynous in US English:
proterogynous
adjectiveˌprəʊtəˈrɒdʒɪnəs
1Botany= "protogynous".
2Zoology= "protogynous".
Origin
Late 19th century; earliest use found in John Lubbock (1834–1913), banker, politician, and scientific writer. From protero- + -gynous, after German protogynisch. Compare earlier protogynous and proterandrous.