Definition

Noun A unit of magnetic flux density equal to one millionth (10⁻⁶) of a gauss. It is used to measure extremely weak magnetic fields.

Usage

"Microgauss" is a scientific term used primarily in physics and astronomy to quantify very small magnetic field strengths. It is a compound unit formed from the metric prefix "micro-" and the unit "gauss."

Examples

• The magnetic field in the vast spaces between galaxies is estimated to be only a few microgauss.
• The experiment required shielding to reduce ambient magnetic noise to below one microgauss.
• Astronomers detected a polarized radio signal indicating a magnetic field strength of approximately 10 microgauss in the nebula.

Advanced Usage

• The term is often used in the context of interstellar or intergalactic magnetic fields, which are typically in the microgauss range.
• Measurements are sometimes given as, for example, "a field of 5 μG," where "μG" is the symbol for microgauss.

Variants and Related Words

• Gauss (G): The base unit of magnetic flux density in the centimeter-gram-second (CGS) system of units. One gauss equals 10⁻⁴ tesla.
• Nanogauss (nG): A unit equal to one thousandth of a microgauss (10⁻⁹ gauss), used for even weaker fields.
• Tesla (T): The SI unit of magnetic flux density. One microgauss equals 10⁻¹⁰ tesla (100 picotesla).

Synonyms

• 10⁻⁶ G: (Scientific notation synonym)
• 0.000001 gauss: (Decimal equivalent)

Notes on Meaning

This word has a single, precise scientific meaning as a unit of measurement. It does not have idiomatic or phrasal verb uses.

Noun

1. a unit of magnetic flux density equal to one millionth of a gauss