"since `em quad' is hard to distinguish from `en quad', printers sometimes called it a `mutton quad'"
a linear unit (1/6 inch) used in printing
EM的用法和樣例:
例句
In printing, the surface area taken up by type of a given size. Thus an8 point type occupies a print area of8 point em. 在印刷技術中,給定尺寸的鉛字所佔有的表面積。這樣,一個8點的鉛字則佔有8點em的印刷面積。
Okay. Well, em, can you stop at the chicken store? 是這樣啊,那你能在雞肉店前停車嗎?