petrichor UK /ˈpɛt.ɹɪ.kəUS /ˈpɛt.ɹɪˌkɔɹ noun2 •The distinctive scent, caused by geosmin, which accompanies the first rain after a long, warm, dry spell.Though it had yet to begin raining, the familiar smell of petrichor appeared to be already present and Neelam suddenly wished she was sitting at home with a nice cup of tea and a good book. — 2010 •The yellow organic oil that yields this scent.He hypothesizes that this factor may be petrichor, an oil which has been isolated from silicate minerals and rocks[…]. — 1980
