aneroid barometer
noun [ C ] uk/ˌæn.ə.rɔɪd bəˈrɒm.ɪ.tər/ us/ˌæn.ə.rɔɪd bəˈrɑː.mə.t̬ɚ/
膜盒气压计，空盒气压表
a piece of equipment that uses a small box whose shape can change in order to measure air pressure and show when the weather is likely to change