蜉蝣 fúyóu mayfly Definitions Defs Origin Strokes Stroke Words Sentences Sents 蜉 fú opaque (segment carries no independent meaning) [insect name] used in insect names蝣 yóu opaque (segment carries no independent meaning) mayfly (bound form) used only in the word for mayfly, 蜉蝣 fúyóu