Definition

1. Noun:
   • A unit of pressure: A microbar is the absolute unit of pressure equal to one dyne per square centimeter. It is a metric unit used in scientific contexts to measure small pressures.

Usage

• The word microbar is a technical, scientific term. It is used almost exclusively in fields like physics, meteorology, and engineering to specify very low pressure values.
• It is a compound noun formed from the prefix "micro-" (meaning one millionth) and "bar" (a unit of pressure). Therefore, one microbar is one millionth of a bar.
• It is typically used with numerical values and in written, formal contexts rather than everyday conversation.

Examples

• Noun:
  • The pressure change was a mere 10 microbars, detectable only by sensitive instruments.
  • Standard atmospheric pressure is approximately 1,013,250 microbars.

Advanced Usage

• "Microbarograph": An instrument for recording very small changes in atmospheric pressure, often measured in microbars.
  • The microbarograph recorded infrasound waves from the distant eruption.

Variants and Related Words

• Bar (n): A unit of pressure equal to 100,000 pascals. The microbar is a subdivision of this unit.
• Millibar (n): A more commonly used unit of pressure in meteorology, equal to one thousandth of a bar or 1,000 microbars.
• Pascal (n): The SI unit of pressure. One microbar is equal to 0.1 pascals.

Synonyms

• Dyne per square centimeter: This is the direct equivalent definition of a microbar, as one microbar equals one dyne per square centimeter. It is a synonym in terms of measurement.

Notes

• The microbar is not an SI unit. The pascal is the standard international unit for pressure.
• In practice, the millibar (mb) or hectopascal (hPa) is far more common in fields like weather reporting, though they are related (1 mb = 1000 microbars).

Noun

1. the absolute unit of pressure equal to one dyne per square centimeter