molecule
noun
mol·e·cule
ˈmä-li-ˌkyül 
1
: the smallest particle of a substance that retains all the properties (see property sense 1a) of the substance and is composed of one or more atoms (see atom sense 1a)
a molecule of water
a molecule of oxygen
2
: a tiny bit : particle
a molecule of political honesty—
Time
TimeSynonyms
Examples of molecule in a Sentence
There is not a molecule of evidence to support these charges.
not a molecule of sense in that girl
Recent Examples on the Web
If the main cause of our actions is not our molecules but the emergent mental states that encode memories, intentions, beliefs and so forth, isn’t that enough for a meaningful notion of free will?
—Quanta Magazine, 10 June 2024
Green Leafy Vegetables Vitamin E, a potent antioxidant, may be key in protecting the body against pro-inflammatory molecules called cytokines.22 One of the best sources of vitamin E is leafy green vegetables, such as spinach, Swiss chard, and kale.
—Amanda MacMillan, Health, 1 June 2024
Biomarkers are molecules found in blood or body tissues that are possible signs of disease.
—wendy Wisner, Parents, 21 May 2024
The researchers adjusted the mixtures’ acidity and temperature to alter the charge of sugar molecules on the yeast organisms’ surfaces; particular metals are drawn to specific charges on the sugars, so this process controlled which metals the yeast attracted and bound.
—Riis Williams, Scientific American, 14 May 2024
See all Example Sentences for molecule 
Quanta Magazine, 10 June 2024
Green Leafy Vegetables Vitamin E, a potent antioxidant, may be key in protecting the body against pro-inflammatory molecules called cytokines.22 One of the best sources of vitamin E is leafy green vegetables, such as spinach, Swiss chard, and kale.
—Amanda MacMillan, Health, 1 June 2024
Biomarkers are molecules found in blood or body tissues that are possible signs of disease.
—wendy Wisner, Parents, 21 May 2024
The researchers adjusted the mixtures’ acidity and temperature to alter the charge of sugar molecules on the yeast organisms’ surfaces; particular metals are drawn to specific charges on the sugars, so this process controlled which metals the yeast attracted and bound.
—Riis Williams, Scientific American, 14 May 2024
See all Example Sentences for molecule
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'molecule.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Molecule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molecule. Accessed 18 Jun. 2024.
Copy CitationKids Definition
molecule
noun
mol·e·cule
ˈmäl-i-ˌkyü(ə)l
1
: the smallest particle of a substance having all the characteristics of the substance
a molecule of water
a molecule of oxygen
2
: a very small bit : particle
Medical Definition
molecule
noun
mol·e·cule
ˈmäl-i-ˌkyü(ə)l
: the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms
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