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A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic.Each prefix has a unique symbol that is prepended to any unit symbol.
micro nano pico femto atto zepto yocto ronto quecto; Prefix symbol d c m μ n p f a z y r q Factor 10 0: 10 −1: 10 −2: 10 −3: 10 −6: 10 −9: 10 −12: 10 − ...
micro μ 0.000 001: 10 −6: nano n 0.000 000 001: 10 −9: pico p 0.000 000 000 001: 10 −12: The prefixes of the metric system precede a basic unit of measure to ...
Nano (symbol n) is a unit prefix meaning one billionth. Used primarily with the metric system , this prefix denotes a factor of 10 −9 or 0.000 000 001 . It is frequently encountered in science and electronics for prefixing units of time and length .
Micro (Greek letter μ, mu, non-italic) is a unit prefix in the metric system denoting a factor of 10 −6 (one millionth). [1] It comes from the Greek word μικρός ( mikrós ), meaning "small".
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Note 1: The lower limit between micro- and nano-sizing is still a matter of debate. Note 2: To be consistent with the prefix “micro” and the range imposed by the definition, dimensions of microparticles should be expressed in μm. [1]
Nanotechnologies are based on physical processes which occur on a scale of nanometres (see nanoscopic scale). [1]The nanometre is often used to express dimensions on an atomic scale: the diameter of a helium atom, for example, is about 0.06 nm, and that of a ribosome is about 20 nm.