ブローホールMeanings1nounblowhole (in metal casting)Technical term for a cavity or void formed in a metal casting or weld due to trapped gas.鋳い物ものにブローホールが見みつかったので、その部ぶ品ひんは不ふ良りょう品ひんとされた。A blowhole was found in the casting, so the part was rejected as defective.
