Bible Dictionaries
Twenty-Fourmo

Webster's Dictionary

(1):

(a.) Having twenty-four leaves to a sheet; as, a twenty-fourmo form, book, leaf, size, etc.

(2):

(n.) A book composed of sheets, each of which is folded into twenty-four leaves; hence, indicating more or less definitely a size of book whose sheets are so folded; - usually written 24mo, or 24¡.

Bibliography Information
Webster, Noah. Entry for 'Twenty-Fourmo'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/twenty-fourmo.html. 1828.