declinometer

/,dekli'nɔmitə/ Cách viết khác : (declinator) /'deklineitə/

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Word: Declinometer

Definition: A declinometer is a noun that refers to an instrument used to measure magnetic declination. Magnetic declination is the angle between magnetic north (the direction a compass points) and true north (the direction toward the North Pole).

Usage Instructions:

• A declinometer is often used by geologists, navigators, and surveyors to find out how much a compass might be off from true north due to the Earth's magnetic field.
• To use a declinometer, you would typically hold it steady and read the angle it shows, which tells you the declination in degrees.

Example:

• "Before setting out on our hiking trip, we checked the declinometer to see how far off our compass was from true north."

Advanced Usage:

• In scientific research, a declinometer can help in understanding changes in the Earth's magnetic field over time and assist in navigation and mapping.

Word Variants:

• Declination (noun): This word refers to the angle or the amount of magnetic declination itself.
• Declinatory (adjective): While not directly related to the instrument, this term can refer to something that causes delay or postponement, but it is not commonly used in relation to declinometry.

Different Meanings:

• In general usage, "decline" can mean to decrease or refuse something, but this is not related to the declinometer.

Synonyms:

• There are no direct synonyms for "declinometer," but related terms might include "compass" (though a compass does not measure declination specifically) and "magnetic compass."

Idioms and Phrasal Verbs:

• There are no specific idioms or phrasal verbs that include "declinometer," as it is a technical term used mostly in scientific contexts.

Summary:

A declinometer is a specialized tool for measuring how much a compass is off from true north due to magnetic forces.

Academic

Noun

1. an instrument for measuring magnetic declination

Synonyms

• transit declinometer