melotype

from The Century Dictionary.

• noun In photography, a photographic process which permits development at any time and does not require a dark room.
• noun A picture made by this process.

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

• noun (Photog.), archaic A picture produced by a process in which development after exposure may be deferred indefinitely, so as to permit transportation of exposed plates; also, the process itself.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun photography A picture produced by a process in which development after exposure may be deferred indefinitely, so as to permit transportation of exposed plates.