octavo

noun
oc·​ta·​vo | \äk-ˈtā-(ˌ)vō, -ˈtä- \
plural octavos

Definition of octavo 

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

First Known Use of octavo

1582, in the meaning defined above

History and Etymology for octavo

Latin, ablative of octavus eighth

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Time Traveler for octavo

The first known use of octavo was in 1582

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Spanish Central: Translation of octavo

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