What is the term used to denote earthy scent produced when rain falls on dry soil?
Petrichor is the earthy scent produced when rain falls on dry soil. The word is constructed from Greek, petra, meaning "stone", + ichor, the fluid that flows in the veins of the gods in Greek mythology. The scent accompanying the first rain after a long period of dry weather has always been described as one of the most pleasant existing smells.