معنی کلمه :‌ petrography

The art of writing on stone.

The scientific description of rocks; that department of science which investigates the constitution of rocks; petrology.

A system of representing all spoken sounds by means of the printing types in common use. Ellis. -- Pa`læ*o*typ"ic*al, a. -- Pa`læ*o*typ"ic*al*ly, adv.