| slovo | definícia |
aneroid barometer
(encz) | aneroid barometer,aneroid n: Zdeněk Brož |
Aneroid barometer
(gcide) | 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.
[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] |
Aneroid barometer
(gcide) | Barometer \Ba*rom"e*ter\, n. [Gr. ba`ros weight + -meter: cf. F.
barom[`e]tre.]
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 |
aneroid barometer
(wn) | aneroid barometer
n 1: a barometer that measures pressure without using fluids
[syn: aneroid barometer, aneroid] |
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