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
TimeExamples 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
Li and his colleagues found that the molecule can shape physiological processes in pandas’ bodies, including growth, biological rhythms, behavior and immune responses.
—Chris Lau, CNN, 28 Feb. 2025
Every Beatles song, every molecule, every vibration is just emblazoned on my soul forever.
—Steve Baltin, Forbes, 28 Feb. 2025
Future studies will be geared toward the detection of pathogenic (or disease-spreading) microbes and signals of human health from environmental metabolites, small molecules that are products of cellular metabolism.
—Jack Knudson, Discover Magazine, 27 Feb. 2025
At the other end of the spectrum, molten rock is out because the tremendous heat required to keep rock liquid also breaks down nearly all organic molecules.
—Kiona N. Smith, Space.com, 20 Feb. 2025
See All Example Sentences for molecule
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Chris Lau, CNN, 28 Feb. 2025
Every Beatles song, every molecule, every vibration is just emblazoned on my soul forever.
—Steve Baltin, Forbes, 28 Feb. 2025
Future studies will be geared toward the detection of pathogenic (or disease-spreading) microbes and signals of human health from environmental metabolites, small molecules that are products of cellular metabolism.
—Jack Knudson, Discover Magazine, 27 Feb. 2025
At the other end of the spectrum, molten rock is out because the tremendous heat required to keep rock liquid also breaks down nearly all organic molecules.
—Kiona N. Smith, Space.com, 20 Feb. 2025
See All Example Sentences for molecule
Articles Related to molecule
Cite this Entry
“Molecule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molecule. Accessed 12 Mar. 2025.
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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