A particular form of photoengraving in which a special carbon tissue is used.
Late 19th century; earliest use found in The Athenaeum. From auto- + either -gravure or French gravure gravure.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。