The term "unknown origin" refers to something that cannot be traced back or identified as to where it came from, who created it, or what its original purpose was. It is a mystery and remains unsolved despite efforts to find information about it.
Sentences with «unknown origin»
Animals can come to us from unknown origins, sometimes with underlying medical issues and conditions, so it is important that you protect your family pets as much as you can. (fohari.org)
Further testing and a chest x-ray revealed a suspicious area of unknown origin in his chest cavity. (springerrescue.org)
The law requires nursing homes to investigate and report all suspected violations and all injuries of unknown origin with five working days to the proper authorities. (dennishernandez.com)