barometer

 
Pronunciation: /bəˈrɒmɪtə/

noun

  • an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude.
  • something which reflects changes in circumstances or opinions: furniture is a barometer of changing tastes

Derivatives

barometric

Pronunciation: /barəˈmɛtrɪk/
adjective

barometrical

Pronunciation: /barəˈmɛtrɪk(ə)l/
adjective

barometry

Pronunciation: /-mɪtri/
noun

Origin:

mid 17th century: from Greek baros 'weight' + -meter