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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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.barometrical - relating to atmospheric pressure or indicated by a barometerbarometrical - relating to atmospheric pressure or indicated by a barometer; "barometric pressure"
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The wind was then blowing from the south-west in the mild degree which in barometrical language is ranked `No.
There are no indications of any great change in the barometrical situation.
While his observations focus to a great extent on barometrical and astronomical data in order to furnish Europe with a reliable picture of America's vast resources, this objective record is framed in a vibrant picture of the multifarious forms of life on the new contintent.