nonface
Etymology
From non- + face.
nonface means that which is not a face (especially in computer face-recognition software). Lexicurio rates it Sui generis — a strength score of 87 out of 100.
noun
- That which is not a face (especially in computer face-recognition software).“As the computer amassed the information, it was able to discover relationships that were of great significance to almost all faces, but very few nonfaces.”