The story
Modeled after polar vortex.
First known use, by meaning
- from 2014 An unusually high concentration of pollen in the air over a relatively short period of time.
Etymology from Wiktionary, CC BY-SA 4.0.
pollen vortex
Today it means: An unusually high concentration of pollen in the air over a relatively short period of time. Full definition →
First used 2014