First recorded in 1960–65.
Comes from petro-, a combining form meaning "rock," and ichor, which in classical mythology means “ethereal fluid flowing in the veins of the gods.”
Sign up for more Word of the Day!

EXAMPLES OF PETRICHOR

The desert landscape was quickly transformed as petrichor filled the air after a long-awaited rainstorm.
As the storm passed, leaving behind puddles and damp earth, the sweet petrichor lingered like a fond memory.

It's National Poetry Month, and we’ve created a challenge that really is for everyone. Submit now!

Did you mean thermoacoustic?