\An"e*roid\, a. [Gr. 'a priv. + nhro`s wet, moist +
-oid: cf. F. an['e]ro["i]de.]
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.

\An"e*roid\, n.
An aneroid barometer.