Buys Ballot's law

English

Etymology

Named after C. H. D. Buys Ballot, Dutch meteorologist.

Proper noun

Buys Ballot's law

1. (meteorology) A rule stating that, in the Northern Hemisphere, if a person stands with their back to the wind, the atmospheric pressure is low to the left and high to the right (because wind travels counterclockwise around low-pressure zones in the Northern Hemisphere).