Not identified; having an unknown or unnamed identity.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "unidentified" in a sentence
"Syria's official news agency, SANA, said nothing about the Homs fighting but said a gas pipeline in the area was blown up by what it called an unidentified terrorist group."
"Consider this: half of the 80,000 genes inventoried from the Costa Rican termites remain unidentified, and each of those 40,000, Warnecke imagines, could require a Ph.D. thesis to figure out."
"These ID opponents, who remain unidentified, complained to Dean Ben Kelley of the School of Engineering and Computer Science, who promptly pulled the plug on Marks 'lab and took down the accompanying website."