aneroid
Concise Oxford English Dictionary © 2008 Oxford University Press:
aneroid /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.
– origin C19: coined in Fr. from Gk a- ‘without’ + nēros ‘water’.
'aneroid' also found in these Oxford entries:

