aneroid

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an·er·oid

(an'er-oyd),
Without fluid; denoting a form of barometer without mercury, in which the varying air pressure is indicated by a pointer governed by the movement of the elastic wall of an evacuated chamber. Also used to denote a mercury-free pressure gauge used with some sphygmomanometers.
[G. a- priv. + nēros, wet, + eidos, form]

aneroid

[an′əroid]
not containing a liquid. The term is used especially to describe a device that does not contain liquid, but that performs the same function as a similar device containing liquid. An example is aneroid barometer.

aneroid

adjective Without liquid; fluidless.

an·er·oid

(an'ĕr-oyd)
Not containing liquid (e.g., a sphygmomanometer that does not contain a column of liquid mercury).
[G. a- priv. + nēros, wet, + eidos, form]

an·er·oid

(an'ĕr-oyd)
Without fluid.
[G. a- priv. + nēros, wet, + eidos, form]