barograph
/'bærougrɑ:f/
Definition
- Noun:
- A recording barometer; an instrument that automatically records variations in atmospheric pressure on paper: A "barograph" is a scientific instrument used in meteorology. It consists of a barometer connected to a pen that marks a continuous line on a rotating drum of paper, creating a permanent chart (a barogram) of pressure changes over time.
Usage
- Noun:
- The ship's navigator checked the barograph to see the recent trend in atmospheric pressure.
- Old weather stations often used a barograph to produce a daily pressure trace.
- The steady fall shown on the barograph chart was a clear sign of the approaching storm.
Advanced Usage
- "Barograph trace" or "barogram": Refers to the specific paper chart produced by the instrument.
- The meteorologist analyzed the barograph trace from the previous 24 hours.
- In professional contexts, a barograph is a key tool for forecasting, as pressure trends are more significant than a single pressure reading.
Variants and Related Words
- Barogram (n): The chart or record produced by a barograph.
- Barometer (n): An instrument for measuring atmospheric pressure. A barograph is a specific type of recording barometer.
- Barographic (adj): Relating to or using a barograph.
- Barographic data is essential for detailed weather analysis.
Synonyms
- Recording barometer: The most direct synonym, describing its function.
- Pressure recorder: A more general term that could include electronic devices.
Related Phrases and Terms
- Aneroid barograph: A common type that uses a sealed, flexible metal box (an aneroid cell) instead of liquid to sense pressure changes.
- Mercury barograph: A less common type that uses a mercury barometer as the sensing element.
- To consult the barograph: A phrase meaning to examine the instrument's record for information.
Noun
-
a recording barometer; automatically records on paper the variations in atmospheric pressure
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