Main Entry: oc·ta·vo

Pronunciation: \äk-ˈtā-(ˌ)vō, -ˈtä-\

Function: noun

Inflected Form(s): plural oc·ta·vos

Etymology: Latin, abl. of octavus eighth

Date: 1582

: the size of a piece of paper cut eight from a sheet; also : a book, a page, or paper of this size