竜りゅう骨こつ突とっ起きりゅうこつとっきMeanings1nounkeel (bird bone); carinaAnatomical term for the ridge on the sternum of birds and some other animals where flight muscles attach.鳥とりの竜りゅう骨こつ突とっ起きは飛とぶために発はっ達たつし
