PATHOLOGY

Detailed explanation-1: -A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure.

Detailed explanation-2: -By definition, a barometer is an instrument measuring atmospheric pressure. Most commonly used in weather forecasting and determining altitude since atmospheric pressure changes will occur as you go further, closer, or below sea level.

Detailed explanation-3: -barometer, device used to measure atmospheric pressure. Because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure altitude. There are two main types of barometers: mercury and aneroid.

Detailed explanation-4: -A barometer is an instrument used to measure air pressure as it varies with distance either above or below sea level.