Em

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EM

Em

A unit of length used in printing. An em is one-sixth of an inch. It is also called a pica.
References in periodicals archive ?
An em dash is the width of a capital "M"; an en dash is the width of a capital "N.
Users can visually control the flow of text in their designs by choosing from em dash, em space, en dash, en space, 1/4 em space, optional hyphen, non-breaking hyphen, nonbreaking space, and column/frame break.