aneroid

adjective

an·​er·​oid ˈa-nə-ˌrȯid 

: using no liquid

specifically : operating by the effect of outside air pressure on a diaphragm forming one wall of an evacuated container

aneroid barometer

Word History

Etymology

French anéroïde, from Greek a- + Late Greek nēron water, from Greek, neuter of nearos, nēros fresh; akin to Greek neos new — more at new

First Known Use

circa 1842, in the meaning defined above

Medical Definition

aneroid

adjective

an·​er·​oid ˈan-ə-ˌrȯid 

: containing no liquid or actuated without the use of liquid

an aneroid manometer