Vigesimo-quarto
enUKVi`ges´i`mo-quar´to
| a. | 1.Having twenty-four leaves to a sheet; as, a vigesimo-quarto form, book, leaf, size, etc. | n. | 1.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°. |