an·​er·​oid ˈa-nə-ˌrȯid How to pronounce aneroid (audio)
: 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


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

Time Traveler
The first known use of aneroid was circa 1842

Dictionary Entries Near aneroid

Cite this Entry

“Aneroid.” Dictionary, Merriam-Webster, Accessed 23 Apr. 2024.

Medical Definition


an·​er·​oid ˈan-ə-ˌrȯid How to pronounce aneroid (audio)
: containing no liquid or actuated without the use of liquid
an aneroid manometer
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