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1. An instrument for measuring atmospheric pressure, used especially in weather forecasting.
2. Something that registers or responds to fluctuations; an indicator: Opinion polls serve as a barometer of the public mood.

bar′o·met′ric (băr′ə-mĕt′rĭk), bar′o·met′ri·cal adj.
bar′o·met′ri·cal·ly adv.
ba·rom′e·try n.
References in periodicals archive ?
Tenders are invited for inspection, supply, and warranty of barometrically compensated capsule dial gauge
The GPS uses its terrain database to calculate and display an electronic glidepath using barometrically derived altitude information.
With WAAS, LNAV/VNAV approaches are no longer barometrically aided, and therefore none of the restrictions discussed here apply when flown using WAAS.