a large, heavy book, especially one dealing with a serious topic (尤指嚴肅的)大部頭書,巨著 a weighty tome 一本沉重的大部頭
Word Originearly 16th cent. (denoting one volume of a larger work): from French, via Latin from Greek tomos ‘section, roll of papyrus, volume’; related to temnein ‘to cut’.