- a book size of about 6 × 9 inches (16 × 23 cm), determined by printing on sheets folded to form 8 leaves or 16 pages. Symbol: 8vo, 8°
- a book of this size.
- in octavo.
Origin of octavo
1575–85; short for New Latin in octāvō in an eighth (of a sheet)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for octavo
They make an octavo volume of about three hundred and fifty pages.
Of this book, published in octavo in 1893, it is impossible to speak too highly.
Another edition of this work was published in octavo at Basle in 1740.
A customer is likely to ask for Ivanhoe in English, octavo, bound in leather.The Classification of Patents
United States Patent Office
The catalogue filled 13 octavo volumes, and the sale occupied 216 days.A Book for All Readers
Ainsworth Rand Spofford
- Also called: eightvo a book size resulting from folding a sheet of paper of a specified size to form eight leavesdemi-octavo Often written: 8vo, 8°
- a book of this size
- (formerly) a size of cut paper 8 inches by 5 inches (20.3 cm by 12.7 cm)
C16: from New Latin phrase in octavo in an eighth (of a whole sheet)
Word Origin and History for octavo
1580s, printer's word for sheets folded to make eight leaves, from Latin in octavo "in the eighth," ablative of octavus "eighth" (see octave). Abbreviation is 8vo.
Online Etymology Dictionary, © 2010 Douglas Harper