So, if I remember correctly Ange Albertini's nomenclature, chimeras are particular types of polyglots where a single data is disguised as different file formats

So, if I remember correctly Ange Albertini's nomenclature, chimeras are particular types of polyglots where a single data is disguised as different file formats. For example, consider a file that is both a JPEG of a picture and a PDF which contains the same picture, and the data of the picture is present only once in the file.