petrichor

[ pe-trahy-kawr, ‐ker ]
/ ˈpɛ traɪˌkɔr, ‐kər /

noun

a distinctive scent, usually described as earthy, pleasant, or sweet, produced by rainfall on very dry ground.

Origin of petrichor

1960–65; petro-1 + ichor (in the classical mythology sense “ethereal fluid”)