[1] : The Collaborative International Dictionary of English v.0.48

aneroid \an"eroid\, a. gr. 'a priv. + nhro`s wet, moist +
   -oid: cf. f. an'ero"ide.
   containing no liquid; -- said of a kind of barometer.
   1913 webster

   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.
      1913 webster
see also:
aneroid barometer 

[2] : The Collaborative International Dictionary of English v.0.48

barometer \barom"eter\, n. gr. ba`ros weight + -meter: cf. f.
   barom`etre.
   an instrument for determining the weight or pressure of the
   atmosphere, and hence for judging of the probable changes of
   weather, or for ascertaining the height of any ascent.
   1913 webster

   note: the barometer was invented by torricelli at florence
         about 1643. it is made in its simplest form by filling
         a graduated glass tube about 34 inches long with
         mercury and inverting it in a cup containing mercury.
         the column of mercury in the tube descends until
         balanced by the weight of the atmosphere, and its rise
         or fall under varying conditions is a measure of the
         change in the atmospheric pressure. at the sea level
         its ordinary height is about 30 inches 760
         millimeters. see sympiesometer. --nichol.
         1913 webster

   aneroid barometer. see aneroid barometer, under
      aneroid.

   marine barometer, a barometer with tube contracted at
      bottom to prevent rapid oscillations of the mercury, and
      suspended in gimbals from an arm or support on shipboard.
      

   mountain barometer, a portable mercurial barometer with
      tripod support, and long scale, for measuring heights.

   siphon barometer, a barometer having a tube bent like a
      hook with the longer leg closed at the top. the height of
      the mercury in the longer leg shows the pressure of the
      atmosphere.

   wheel barometer, a barometer with recurved tube, and a
      float, from which a cord passes over a pulley and moves an
      index.
      1913 webster barometric
see also:
sympiesometer aneroid barometer aneroid marine barometer mountain barometer siphon barometer 
wheel barometer 

[3] : WordNet (r) 2.0

aneroid barometer
     n : a barometer that measures pressure without using fluids
         syn: aneroid
see also:
aneroid 

Aneroid >> A Words
Aneroid, definition of term: Aneroid
aneroid_pag1.html

Barometer >> B Words
Barometer, definition of term: Barometer
barometer_pag1.html

Aneroid Baromet >> A Words
Aneroid Baromet, definition of term: Aneroid Baromet
aneroid+baromet_pag1.html