molecule
noun
the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound.
molecules
-
pluralof molecule.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The meeting of water and plastic creates a third class of molecules called reactive oxygen species.
From Los Angeles Times ● Oct. 17, 2026
But a Columbia University research team has found that when water molecules come into contact with plastic surfaces, a key chemical reaction does in fact take place.
From Los Angeles Times ● Oct. 17, 2026
Carbon dioxide and water meet in the chloroplasts, where solar energy breaks down their molecules and reassembles them into the sugar glucose plus “a side order of oxygen,” the author writes.
From The Wall Street Journal ● Oct. 16, 2026
Specialized immune receptors can recognize these foreign molecules and trigger a protective response.
From Science Daily ● Oct. 15, 2026
It is impossible for molecules to have energies in between these acceptable values.
From "Zero: The Biography of a Dangerous Idea" by Charles Seife
