What is the X in X-mas?
word-forming element meaning "process of writing or recording" or "a writing, recording, or description," from French or German -graphie, from Greek -graphia "description of," from graphein "write, express by written characters," earlier "to draw, represent by lines drawn," originally "to scrape, scratch" (on clay tablets with a stylus), from PIE root *gerbh- "to scratch, carve" (see carve). In modern use, especially in forming names of descriptive sciences.
A writing or representation produced in a specified manner or by a specified process: tomography.
A writing about or a representation of a specified thing: ophthalmography.