疲ひ労ろう骨こっ折せつひろうこっせつMeanings1nounstress fractureMedical term for a small crack in a bone caused by repetitive force or overuse, rather than a single traumatic injury.ランナーは疲ひ労ろう骨こっ折せつのため、しばらく練れん習しゅうを休やすんだ。