"scent of rain" redirects here. for the play by mark dunn, see scent of rain. for other uses, see scent of rain (disambiguation) "smell of rain" redirects here. for the mortiis album, see the smell of rain. petrichor is the scent of rain on dry earth. the word is constructed from greek, petra, meaning stone + ichor, the fluid that flows in the veins of the gods in greek mythology. it is defined as "the distinctive scent which accompanies the first rain after a long warm dry spell".