bromogelatin

from The Century Dictionary.

• Formed from or prepared with certain bromides together with silver nitrate and gelatin, as the sensitive emulsions used for preparing dry plates in photographic work. See emulsion and developer.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Photog.) Designating or pertaining to, a process of preparing dry plates with an emulsion of bromides and silver nitrate in gelatin.