from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The size (5 by 7 3/4 inches) of book pages formed by folding single sheets from a printing press into 12 leaves each.
- n. A book composed of pages of this size.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A size of paper, so called because it is originally made by folding and cutting a single sheet from a printing press into 12 leaves; (5 by 7¾ inches): 6.5 to 7.5 inches high, approximately 4.5 inches wide.
- n. A sheet or page of that size
- n. A book having pages of that size
from the GNU version of the Collaborative International Dictionary of English
- adj. Having twelve leaves to a sheet
- n. A book consisting of sheets each of which is folded into twelve leaves; hence, indicating, more or less definitely, a size of a book; -- usually written 12mo or 12°.
from The Century Dictionary and Cyclopedia
- n. A size of page usually measuring, in the United States, about 5⅛ inches in width and 7⅔ inches in length, when the leaf is uncut, and corresponding to crown octavo of British publishers.
- n. A book composed of sheets which, when folded, form twelve leaves of this size.
- n. In music, the interval of a twelfth.
- Consisting of sheets folded into twelve leaves; having leaves or pages measuring about 5⅛ by 7⅔ inches. Often written 12mo or 12°.
_Inset_, the portion of a sheet cut off and inserted in folding certain sizes, such as duodecimo, &c. (see Fig. 4).
A "duodecimo" sheet has the pages arranged as at fig. 4.
"duodecimo," &c. These names signify the number of folds, and consequently the number of leaves the paper has been folded into.
I recently picked up a copy of In Art or Instruction, a limited duodecimo-sized edition published in 1969 as a greeting to friends of Harcourt, Brace & World Inc. on the occasion of its fiftieth year.
The format … was that of a box or casket, the raw materials for which were provided by the specimen itself, made up in the form of a book – varying in size from folio to duodecimo – with the ‘front cover’ forming a sliding lid …
"Let no man," as Sterne says, "say, — I will write a duodecimo."
Histoire et description générale de la Nouvelle France, with Journal historique, 3 vols. in quarto, 6 vols. in duodecimo Paris, 1744.
Tross, Paris, 1866, in four duodecimo volumes, still the edition of choice.
The experience of reading a small duodecimo, designed to be held easily in one hand, differs considerably from that of reading a heavy folio propped up on a book stand.
Come down to the duodecimo size instantly, Mr. Hood.