1. a book size resulting from folding a sheet of paper four times to make sixteen leaves
Usage: printing; bookbinding

Examples

• The publisher decided to print the poetry collection in sixteenmo format.
• Sixteenmo books are compact and portable, making them popular for pocket editions.
• The rare book dealer specialized in sixteenmo volumes from the 18th century.
• She collected miniature books, particularly those printed in sixteenmo.
• The sixteenmo edition fit perfectly in his coat pocket.
• Libraries often catalog books by size, including sixteenmo format.