411 REFERENCE · Wiktionary
Buys Ballot's law
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named after C. H. D. Buys Ballot, Dutch meteorologist.
Proper noun
Buys Ballot's law
en 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).
en eponyms