noun, plural oc·ta·vos for 2.
Origin of octavo
Examples from the Web for octavo
Although this book (an octavo) bore no date, the names of the subscribing bishops fix it as 1566 or 1567.A Short History of English Printing, 1476-1898|Henry R. Plomer
The present edition is in a duodecimo, instead of an octavo form, and is sold at a less price than the previous ones.
The original edition of Parts i-iii is in quarto, Part iv in octavo.
The second is a work on government, by the Marquis de Condorcet, two volumes, octavo.
A water-color drawing of jumping mouse, by Gilpin; octavo size, pencil drawing of skulls of Shrews.Nature Books Popular and Scientific from The Franklin Bookshop, 1910|Samuel N. Rhoads