noun
pronotum
Entomological term for the dorsal sclerite of the prothorax in insects.
カブトムシの前胸背板には角がある。
The rhinoceros beetle has a horn on its pronotum.
Compound of 前 (zen, 'front') + 胸 (kyō, 'thorax') + 背板 (haiban, 'dorsal plate'). A technical term in entomology.