nounWord forms: plural ocˈtavos
size of a book made up of printer's sheets folded into eight leaves: the usual
size of each leaf
is 6 by 9 inches
a book consisting of pages of this size
consisting of pages of this size
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.