Dictionary entry

Baroscope

Webster's Dictionary 1913

Bar″o‐scope (băr″ō̍‐skōp), n. [Gr. βαροσ weight + -scope: cf. F. baroscope.] Any instrument showing the changes in the weight of the atmosphere; also, less appropriately, any instrument that indicates or foreshadows changes of the weather, as a deep vial of liquid holding in suspension some substance which rises and falls with atmospheric changes.