* It's a misspelling. Perhaps you meant a similar-sounding word like "keratography" (a medical procedure for treating corneal diseases) or "typography" (the art of designing and arranging type).
* It's a niche term. It might be specific to a particular hobby, industry, or academic field. If you have more context about where you encountered this term, it might help identify its meaning.
Can you provide more information about where you saw "kerography" used? This will help me understand what you're looking for and give you a more accurate answer.