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
Because cannabis plants only produce a small amount of Delta 8, most Delta 8 products contain a synthesized form of the cannabinoid, which is made by rearranging the molecules of CBD (cannabidiol), according to Leafwell.
—Greta Cross, USA Today, 19 Apr. 2025
Starlight filtered through its atmosphere, carrying the fingerprints of atmospheric molecules to the telescope.
—Daniel Apai, The Conversation, 18 Apr. 2025
According to Madhusudhan and his team, one of the molecules that K2-18b’s atmosphere contained was dimethyl sulfide.
—Ross Andersen, The Atlantic, 18 Apr. 2025
Proteins are essential molecules that the body cannot manufacture internally.
—Marie Bladt, Vogue, 18 Apr. 2025
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Greta Cross, USA Today, 19 Apr. 2025
Starlight filtered through its atmosphere, carrying the fingerprints of atmospheric molecules to the telescope.
—Daniel Apai, The Conversation, 18 Apr. 2025
According to Madhusudhan and his team, one of the molecules that K2-18b’s atmosphere contained was dimethyl sulfide.
—Ross Andersen, The Atlantic, 18 Apr. 2025
Proteins are essential molecules that the body cannot manufacture internally.
—Marie Bladt, Vogue, 18 Apr. 2025
See All Example Sentences for molecule
Cite this Entry
“Molecule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molecule. Accessed 22 Apr. 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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