Home › Words › M › monogeneanmonogenean/ˌmɒn əˈdʒiːniːən/monogenean means any of the many trematode flatworms of the class Monogenea, mostly ectoparasites on fish.Among words judged in Lexicurio's Arena, monogenean ranks #34,871 of 42,752 for Qualifying.monogenean is pronounced /ˌmɒn əˈdʒiːniːən/.EtymologyFrom translingual Monogenea + -an.nounAny of the many trematode flatworms of the class Monogenea, mostly ectoparasites on fishDefinitions & examples from Wiktionary (CC BY-SA 3.0).