Aneroid

a.	1.	Containing no liquid; - said of a kind of barometer. Aneroid barometer a barometer the action of which depends on the varying pressure of the atmosphere upon the elastic top of a metallic box (shaped like a watch) from which the air has been exhausted. An index shows the variation of pressure.
n.	1.	An aneroid barometer.

Noun	1.	aneroid - a barometer that measures pressure without using fluids Synonyms: aneroid barometer
Adj.	1.	aneroid - containing no liquid or actuated without the use of liquid; "aneroid barometer"

aneroid barometer