milliwatt

noun

mil·​li·​watt ˈmi-lə-ˌwät How to pronounce milliwatt (audio)
: one thousandth of a watt

Examples of milliwatt in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The measured heat flow is 46 milliwatts per square meter, which compared to Earth is two-thirds the heat loss through our continental plates. — Keith Cooper, Space.com, 7 Nov. 2025 This is measured as irradiance (milliwatts per square centimeter) and fluence (total energy delivered) which is determined by the length of exposure. — Jesse Pines, Forbes.com, 28 May 2026 The design achieved power densities of 639 milliwatts/cm², which is the amount of electrical power generated per square centimeter of fuel cell area. — Tejasri Gururaj, Interesting Engineering, 25 Sep. 2025 James Provost In practical terms, this shouldn’t create any noticeable interference, given that this transmitter puts out milliwatts at most and floats miles away from the nearest receiver. — IEEE Spectrum, 31 Jan. 2026 See All Example Sentences for milliwatt

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1914, in the meaning defined above

Time Traveler
The first known use of milliwatt was circa 1914

Rhymes for milliwatt

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Browse Nearby Words

millivolt
milliwatt
millken
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Cite this Entry

“Milliwatt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/milliwatt. Accessed 7 Jul. 2026.

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Medical Definition

milliwatt

noun
mil·​li·​watt ˈmil-ə-ˌwät How to pronounce milliwatt (audio)
: one thousandth of a watt
—abbreviation mW
Last Updated: - Updated example sentences
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