Vi*ges"i*mo-quar"to (?), a. [L. vigesimus quartus twenty-fourth. Cf. Duodecimo.]
Having twenty-four leaves to a sheet; as, a vigesimo-quarto form, book, leaf, size, etc.
© Webster 1913.
Vi*ges"i*mo-quar"to, 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°.
© Webster 1913.