It means the smell of dust after rain...you didn't ask yet, but you will. Our Petrichor shirt is perfect for the Doctor Who fan, the nature lover, and the word nerd! Whether you're looking for a nature lover gift, English teacher gift, or just a fun geeky shirt to teach people a new word, our nerdy word definition shirt is sure to be a hit! This petrichor definition t-shirt is great for rainy days and for outdoor adventures. So if you want to show your love for Amy Pond's fragrance line, or you're just a word nerd, this nature shirt is perfect!