from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An early type of photograph made by imaging a negative on glass backed by a dark surface.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. an early type of photograph in which a glass negative appears positive when displayed on a black background
from the GNU version of the Collaborative International Dictionary of English
- n. A picture taken on a plate of prepared glass, in which the lights are represented in silver, and the shades are produced by a dark background visible through the unsilvered portions of the glass.
from The Century Dictionary and Cyclopedia
- n. In photography, a picture made by applying a dark backing to the face of a thin negative on glass.
Greek ambrotos, immortal; see ambrosia + type.(American Heritage® Dictionary of the English Language, Fourth Edition)