Fortin barometer

[fawr-tan; French fawr-tan]

noun

an adjustable cistern barometer, the most common of those employing mercury.

Origin of Fortin barometer

1870–75; named after J. Fortin (1750–1831), French physicist who invented it

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018