octavo

• 指将整张纸对折三次后形成的八开本，即每张纸裁成八页的开本；也指这种开本的书。

A noun referring to a book size determined by folding a sheet of paper three times to create eight leaves, or a book of this size.

1. C2formal

   A book size resulting from folding a standard sheet of paper three times to create eight leaves (16 pages).

   八开本

   • The rare edition was printed in octavo format.
   • Many 19th-century novels were published as octavos.
   • The library's collection includes several octavo volumes.