Petrichor

Petrichor ( PET-rih-kor) is the earthy scent from an array, in particular, of plant-derived chemicals, produced when rain falls on dry soil. The word was coined in 1964 by Australian scientist Richard Thomas, in a paper co-authored with Isabel Bear which described the phenomenon. The term was derived from from Ancient Greek πέτρα (pétra) 'rock'; or πέτρος (pétros) 'stone' and ἰχώρ (ikhṓr) 'ichor', the ethereal fluid that is the blood of the gods in Greek mythology.