QUARTO
Here are the details, including the meaning, point value, and more about the Scrabble word QUARTO. Below
quarto is worth 21 points in the game of Scrabble
Definitions for the word, quarto
(a.) Having four leaves to the sheet; of the form or size of a quarto.
(n.) Originally, a book of the size of the fourth of sheet of printing paper; a size leaves; in present usage, a book of a square or nearly square form, and usually of large size.