Pica: A unit of typographic linear measurement in which one pica equal to 12 points. The pica is approximately 4.21 mm or one-sixth inch. See Em, Piont system.

• 倍卡:排字上用的长度单位，1倍卡等于12点。1倍卡约为4.；21毫米或六分之一寸。参阅正方，点度制。