名詞 octavo:

1. the size of a book whose pages are made by folding a sheet of paper three times to form eight leaves
   同義詞：eightvo, 8vo

oc.ta.vo

n.（名詞）
【復數(shù)】 oc.ta.vos 縮寫 o,O,O.,oct.【印刷術】
The page size, from 5 by 8 inches to ' by 9ô inches, of a book composed of printer`s sheets folded into eight leaves.
八開本：紙張尺寸，大小5英寸乘8英寸到'英寸乘9又/2英寸，折成八面后裝訂成的書的紙頁
A book composed of octavo pages.Also called eightvo
由八開頁紙做成的書也作 eightvo

來源：
Medieval Latin (in) oct3vô [(in) an eighth]
中世紀拉丁語 (in) oct3vô [（在…里）一個第八]
from Latin [ablative sing. of] oct3vus [eighth]
源自 拉丁語 [] oct3vus的奪格單數(shù) [第八]
from octô [eight] * see oktô(u)
源自 octô [八] *參見 oktô(u)