指し骨こつしこつMeanings1nounphalanx; phalangeanatomy›Anatomical term for a finger or toe bone. In medical contexts, 指骨 usually refers to finger phalanges, while 趾骨 (しこつ) specifically refers to toe phalanges.See also: 趾骨指し骨こつの骨こっ折せつは、スポーツでよく見みられる。