Etymology
The word "barometer" is derived from the Greek words "baros" (weight, pressure) and "metron" (measure).
Meaning
A barometer is a scientific instrument used to measure atmospheric pressure. It can be used to predict weather changes, as changes in air pressure are often associated with changes in weather conditions.
Origin
The first barometer was invented by the Italian scientist Evangelista Torricelli in 1643. Torricelli's barometer consisted of a glass tube filled with mercury that was inverted and placed in a dish of mercury. The height of the mercury column in the tube was proportional to the atmospheric pressure outside the tube.
Barometers have since been refined and improved over time. Modern barometers use a variety of technologies to measure atmospheric pressure, including aneroid barometers, digital barometers, and weather stations.
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