tome
/təʊm/noun
- chiefly humorous a book, especially a large, heavy, scholarly one〈主幽默〉书; 大部头书; （有学术价值的）巨著：
a weighty tome.
一本沉甸甸的大部头书。
词源
early 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'.