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| | aneroid barometer | เครื่องวัดความกดดันของบรรยากาศที่ไม่ใช้ปรอท | | barometer | (บะรอม'มิเทอะ) n. เครื่องวัดความกดดันของอากาศ, See also: barometric adj. ดูbarometer barometrical adj. ดูbarometer |
| | | | บารอมิเตอร์ | (n) barometer, Syn. บาโรมิเตอร์, Example: เขากำลังศึกษาวิธีใช้บารอมิเตอร์ที่ถูกต้องอยู่, Count Unit: ตัว, อัน, Thai Definition: เครื่องมือที่ใช้วัดความกดดันของบรรยากาศ อาจประกอบด้วยปรอท หรือตลับโลหะสุญญากาศแล้วแต่ความมุ่งหมายและความสะดวกที่จะนำไปใช้, Notes: (อังกฤษ) |
| | | | | | | Barometer | n. [ Gr. ba`ros weight + -meter: cf. F. baromètre. ] 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 ] ☞ 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 ]
| | Hydrobarometer | n. [ Hydro-, 1 + barometer. ] An instrument for determining the depth of the sea water by its pressure. [ 1913 Webster ] | | Telehydrobarometer | n. [ Gr. th^le far + hydrobarometer. ] An instrument for indicating the level of water in a distant tank or reservior. [ Webster 1913 Suppl. ] | | Thermobarometer | n. [ Thermo- + barometer. ] 1. (Physics) An instrument for determining altitudes by the boiling point of water. [ 1913 Webster ] 2. A siphon barometer adapted to be used also as a thermometer. [ Webster 1913 Suppl. ] | | Water barometer | (Physics) A barometer in which the changes of atmospheric pressure are indicated by the motion of a column of water instead of mercury. It requires a column of water about thirty-three feet in height. [ 1913 Webster ] |
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