| Quarto | a. [ L. in quarto in fourth, from quartus the fourth: cf. F. (in) quarto. See Quart. ] Having four leaves to the sheet; of the form or size of a quarto. [ 1913 Webster ] |
| Quarto | n.; pl. Quartos 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. [ 1913 Webster ] |
| Vigesimo-quarto | a. [ L. vigesimus quartus twenty-fourth. Cf. Duodecimo. ] Having twenty-four leaves to a sheet; as, a vigesimo-quarto form, book, leaf, size, etc. [ 1913 Webster ] |
| Vigesimo-quarto | n.; pl. -tos A book composed of sheets each of which is folded into twenty-four leaves; hence, indicating more or less definitely a size of book so made; -- usually written 24mo, or 24°. [ 1913 Webster ] |
