agate

名词 agate:

1. an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles

1. A unit of advertising copy equal to one agate line one column wide printed in one million copies of a publication.
   百万行一种宣传广告品的单位，等于现在一百万份出版物上的一行一栏宽的报纸广告行