aneroid

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aneroid

[′an·ə‚rȯid]
(engineering)
Containing no liquid or using no liquid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

aneroid

aneroid
A thin, disc-shaped box or capsule, usually metallic, partially evacuated of air and sealed, which expands and contracts with changes in atmospheric or gaseous pressure. The aneroid is the sensing and actuating element in various meters or gages, such as barometers, altimeters, and manifold-pressure gages. It is also the triggering or operating element in various automatic mechanisms. A device similar to an aneroid but open to outside pressures, such as the capsule in an air-speed indicator, is not commonly called an aneroid.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The example shown here is one of these banjo aneroid barometers, dating to the late 19th/early 20th century.