You searched for: “petrichors
petrichor (s) (noun), petrichors (pl)
1. The scent that comes up from a pavement, or dry earth, after rain has started to fall: The pleasant odor of petrichor often results after a long period of warm, dry weather.

It is believed that the oils from the rocks come from vegetation during dry periods and so the petrichors are adsorbed on the surfaces of stones and soil particles which are then spread into the air by the next rain.

2. Etymology: from Greek petro," stone, rocks" + ichor, "fluid that flows like blood in the veins of the gods."
This entry is located in the following unit: petro-, petr-, petri-, peter- (page 1)