Bible Dictionaries
Em

Webster's Dictionary

(n.) The portion of a line formerly occupied by the letter m, then a square type, used as a unit by which to measure the amount of printed matter on a page; the square of the body of a type.

Bibliography Information
Webster, Noah. Entry for 'Em'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​e/em.html. 1828.