Micrometer
Micrometer
A Micrometer (pronounced: /maɪˈkrɒmɪtər/), also known as a micron, is a unit of length in the SI that is equal to one millionth of a meter (1×10-6 m). It is used in medicine and science to measure objects and distances that are too small to be seen with the naked eye.
Etymology
The term "micrometer" comes from the Greek words "mikros" meaning "small" and "metron" meaning "measure".
Usage in Medicine
In the field of medicine, micrometers are often used to measure cells, bacteria, and viruses. For example, most human cells are 10-20 micrometers in diameter, while bacteria are typically 1-10 micrometers in size.
Related Terms
- Nanometer: A unit of length in the SI that is equal to one billionth of a meter (1×10-9 m). It is smaller than a micrometer and is often used to measure molecules and atoms.
- Millimeter: A unit of length in the SI that is equal to one thousandth of a meter (1×10-3 m). It is larger than a micrometer and is often used to measure small objects that can be seen with the naked eye.
- SI: The modern form of the metric system, and is the most widely used system of measurement. It includes the micrometer, nanometer, and millimeter.
External links
- Medical encyclopedia article on Micrometer
- Wikipedia's article - Micrometer
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