bolthead /'bəʊlthed/ 📖 中文释义 螺钉的头, 长颈烧瓶, (枪)机头 📘 English Definition(英文释义) n. A long, straight-necked, glass vessel for chemicaldistillations; -- called also a matrass or receiver.n. The head of a bolt. ← bolters B 字母词表 bolthole →