ambrotype（n.）
“ambrotype”是一种在玻璃上拍摄的照片，由银提供光线，黑色背景提供阴影，可追溯至1855年的美国英语，显然源自希腊语 ambrotos “不朽的，不灭的”（参见 ambrosia），第二个元素来自 daguerreotype。
This invention consists in an improved process of taking photographic pictures upon glass, and also of beautifying and preserving the same, which process I have styled "ambrotype." My improved process has reference to the art of taking pictures photographically on a film of collodion upon the surface of a sheet of glass, the collodion being suitably prepared for the purpose. By the use of the said process, the beauty and permanency of such pictures are greatly increased, and I have on this account styled the process "ambrotype," from the Greek word ambrotos, immortal. ["Specification of the Patent granted to James A. Cutting, of Boston, in the United States of America, Photographer, for an Improved Process of taking Photographic Pictures upon Glass and also of Beautifying and Preserving the same. Dated London, July 26, 1854," printed in Journal of the Franklin Institute, September 1855]
这项发明涉及在玻璃表面上用胶质膜拍摄照片的艺术，并美化和保护它们的改进过程，我称之为“ambrotype”。我的改进过程是指在为此目的适当准备的玻璃片表面上用胶质膜拍摄照片的艺术。通过使用该过程，这些照片的美丽和持久性得到了极大的提高，因此我将该过程称为“ambrotype”，来自希腊语单词 ambrotos，意为不朽的。[“James A. Cutting 的专利规范，美国波士顿摄影师，用于在玻璃上拍摄照片的改进过程以及美化和保护同样的专利，日期为1854年7月26日，伦敦印刷，1855年9月发表于富兰克林研究所杂志]
该词起源时间：1855年