noun
navicular disease; navicular syndrome
Medical term for a chronic condition affecting the navicular bone in horses, causing lameness.
舟嚢炎は馬の跛行の原因の一つです。
Navicular disease is one of the causes of lameness in horses.
Compound of 舟 (shū, 'boat', here referring to the navicular bone's shape), 嚢 (nō, 'sac, bursa'), and 炎 (en, 'inflammation'). The exact historical derivation is uncertain; the spelling is conventionally associated with the medical meaning.