Source : Webster's Revised Unabridged Dictionary (1913)

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

Aneroid \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.

Source : WordNet®

aneroid
     n : a barometer that measures pressure without using fluids
         [syn: {aneroid barometer}]

aneroid
     adj : containing no liquid or actuated without the use of liquid;
           "aneroid barometer"