Spelling Bee Hive found 1 result for protephemeroidea. This page contains the same results as searching for that word in the app.
Protephemeroidea - plural noun; Level 9; origin: New Latin; pronunciation: ˌprōtə̇ˌfeməˈrȯidēə. an extinct order of Carboniferous insects related to mayflies, with long tail filaments and many wing crossveins.
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