Dictionary

aneroid

adjective an·er·oid \ˈa-nə-ˌrid\

Definition of ANEROID

:  using no liquid; specifically :  operating by the effect of outside air pressure on a diaphragm forming one wall of an evacuated container <aneroid barometer>

Origin of ANEROID

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

aneroid

adjective an·er·oid \ˈan-ə-ˌrid\   (Medical Dictionary)

Medical Definition of ANEROID

:  containing no liquid or actuated without the use of liquid <an aneroid manometer>

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