aneroid

 
Pronunciation: /ˈanərɔɪd/

adjective

  • relating to or denoting a barometer that measures air pressure by the action of the air in deforming the elastic lid of an evacuated box.

noun

  • an aneroid barometer.

Origin:

mid 19th century: coined in French from Greek a- 'without' + nēros 'water'