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Definition of nanometer

nanometer

/ˈnæn.oʊˌmiː.tɚ/
(UK: nanometre)
nan · o · me · ter
Plural:nanometers
•
Adjective:nanometric
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nanometer Lexical Profile

nanometer Game Scores & Validity

• noun

1

American A metric unit of length equal to one billionth of a meter (10⁻⁹ meter), commonly used to measure wavelengths of light, atomic dimensions, and semiconductor components.

Example

"Visible light consists of electromagnetic waves with wavelengths ranging from approximately 380 to 750 nanometers."

Synonyms
View all synonyms for nanometer

• Nearby Words

nanocrystal
nanocrystalline
nanomachine
nanometer
nanoplastic
nanoscience
nanosecond

Word Origin & Etymology

Coined in the 1960s from the scientific prefix 'nano-' (derived from the Ancient Greek 'nanos', meaning 'dwarf', to denote one billionth) combined with 'meter', replacing the older term 'millimicron'.

Cite this Entry

Wordmom. (2026). Definition of Nanometer. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/nanometer
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