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Nanometer

Abbreviation is nm. 10 to the -9 power meters. The term nanometer has replaced the term millimicron that was used before 1967.

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Related terms

nanometer
Internet; Internet communication

A unit of length representing one-billionth of a meter.

nanometer
Natural environment; Coral reefs

A unit of length equal to 0.001 microns (one thousandth of a micron), 0.000001 millimeters, or 0.000000001 meters; also called a millimicron.

nanometer
Astronomy; Planetary science

Unit of measure that is one-billionth of a meter. A nanometer-sized particle is smaller than a living cell and can only be seen with the most powerful microscopes.

nanometer
Physics; Color science

One billionth (10-9) of a meter. The most common unit used for characterizing the wavelength of light in visual science.

nanometer
Health care; Optometry

A measurement of length equal to one-billionth of a meter. Abbreviated as nm. Wavelengths of light are measured in nanometers. Eyeglass and sunglass lens manufacturers use ...

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A measure of length in the metric system. A nanometer is one billionth of a meter. An average human hair is about 60,000 nanometers thick. Nanometers are used to measure ...

ophthalmoscope
Eyewear; Optometry

An optical instrument used to examine the external and internal parts of the eye, particularly the media and the fundus.

pantoscopic angle
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1. Angle in the vertical plane between the optical axis of a spectacle lens and the visual axis of the eye in the primary position, usually taken to be the horizontal. 2. Angle ...

optical material
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Transparent material capable of being manufactured into optical components.

optical radiation hazard
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Possibility of damage to the retina by optical radiation.

optical centre
Eyewear; Optometry

For practical purposes, the intersection of the optical axis with the front surface a lens.

ophthalmoscope
Optometry; Optometry

An optical instrument used to examine the external and internal parts of the eye, particularly the media and the fundus.

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