barometer
/bəˈrɒmɪtə(r)/noun
1- an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude（尤指用来预报天气和测量海拔的）气压计; 晴雨表。
1.1
- something which reflects changes in circumstances or opinions（环境或观点）变化的标志：
furniture is a barometer of changing tastes.
家具是品味变化的标志。
派生词
barometric
adjectivebarometrical
adjectivebarometry
noun词源
mid 17th cent.: from Greek baros 'weight' + -METER.