Definition of 馬大頭 (おにやんま)

noun
Siebold's dragonfly (Anotogaster sieboldii), jumbo dragonfly(usually kana)
Other readings:
おにやんま《鬼蜻蜓》[1]
オニヤンマ
Notes:
  1. word containing out-dated kanji
Related Kanji
horse
large, big
head, counter for large animals
ghost, devil
dragonfly
dragonfly, millipede, lizard