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 ultra-fine mist is infused with niacinamide for a shine-free finish and sodium hyaluronate—a derivative of hyaluronic acid that's smaller in molecular weight—to penetrate the surface layer of the skin for a hydrated, dewy finish.
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Jennifer Hussein, Allure, 3 Oct. 2024
Other larger peptides are able to repair damage at the surface of the cuticle, but a smaller molecular weight allows our peptides to penetrate all the way into the medulla, or the deepest parts of the hair’s core.
—Celia Shatzman, Forbes, 1 Oct. 2024
Small molecule drugs are made of chemicals that have low molecular weight, while biologic medicines are derived from living sources such as animals or humans.
—Annika Kim Constantino, CNBC, 15 Aug. 2024
Each has a different molecular weight, so the product can instantly revive dry, parched skin and provide additional moisture throughout the day (or night).
—Devon Abelman, Allure, 12 Aug. 2024
See all Example Sentences for molecular weight 
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Jennifer Hussein, Allure, 3 Oct. 2024
Other larger peptides are able to repair damage at the surface of the cuticle, but a smaller molecular weight allows our peptides to penetrate all the way into the medulla, or the deepest parts of the hair’s core.
—Celia Shatzman, Forbes, 1 Oct. 2024
Small molecule drugs are made of chemicals that have low molecular weight, while biologic medicines are derived from living sources such as animals or humans.
—Annika Kim Constantino, CNBC, 15 Aug. 2024
Each has a different molecular weight, so the product can instantly revive dry, parched skin and provide additional moisture throughout the day (or night).
—Devon Abelman, Allure, 12 Aug. 2024
See all Example Sentences for molecular weight
Dictionary Entries Near molecular weight
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“Molecular weight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molecular%20weight. Accessed 5 Nov. 2024.
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