barometer

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ba·rom·e·ter / bəˈrämitər/ • n. an instrument measuring atmospheric pressure, used esp. in forecasting the weather and determining altitude. ∎  something that reflects changes in circumstances or opinions: furniture is a barometer of changing tastes.DERIVATIVES: bar·o·met·ric / ˌbarəˈmetrik/ adj.bar·o·met·ri·cal adj.ba·rom·e·try / -ˈrämitrē/ n.

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