High score, please help me to give an English name.

It may seem to have nothing to do with "rain" or "dust", but it does.

it means: scent of rain on dry earth. The smell of rain falls on the dust.

it is composed of Greek:

Petra: stone [dust]

Ichor: ethereal golden fluid that is the blood of the gods. [Rain ]

Actually, this word is not commonly used. I still need google to remember this word.