molecular weight
noun
: the average mass of a molecule of a compound compared to ¹/₁₂ the mass of carbon 12 and calculated as the sum of the atomic weights of the constituent atoms
Examples of molecular weight in a Sentence
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Its hyaluronic acid has a small molecular weight—all the better to penetrate the skin and deliver deep hydration—and the concealer is also infused with peptides to soften fine lines.
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Jenny Berg, Vogue, 22 Mar. 2025
In layman's terms, that means five types of HA with low, medium, and high molecular weights to address skin at different levels—not just the surface.
—Sarah Han, Allure, 22 Feb. 2025
Phthalates with a high molecular weight have seven or more carbon atoms.
—Kristen Rogers, CNN Money, 2 Apr. 2025
But what stuck out to me was that the protein is not easily absorbed into skin due to its high molecular weight.
—Kiana Murden, Vogue, 21 Mar. 2025
See All Example Sentences for molecular weight
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Jenny Berg, Vogue, 22 Mar. 2025
In layman's terms, that means five types of HA with low, medium, and high molecular weights to address skin at different levels—not just the surface.
—Sarah Han, Allure, 22 Feb. 2025
Phthalates with a high molecular weight have seven or more carbon atoms.
—Kristen Rogers, CNN Money, 2 Apr. 2025
But what stuck out to me was that the protein is not easily absorbed into skin due to its high molecular weight.
—Kiana Murden, Vogue, 21 Mar. 2025
See All Example Sentences for molecular weight
Cite this Entry
“Molecular weight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molecular%20weight. Accessed 3 May. 2025.
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