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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Using ultra-low molecular weight collagen and low molecular weight hyaluronic acid (otherwise known as oligo HA) means deeper penetration of hydrating, plumping goodness.
—
Sarah Han, Allure, 22 Feb. 2025
At low molecular weights, these hydrocarbons are either gases, liquids, or soft solids, much too weak to withstand the rigors of the rocket’s combustion chamber.
—IEEE Spectrum, 5 Nov. 2014
It’s also formulated with mixed molecular weight hyaluronic acid to deliver moisture deeply into the hair follicles for extra nourishment.
—Kiana Murden, Vogue, 23 Jan. 2025
This incredibly soothing gel mask subs regular ‘ol hyaluronic acid with oligo-hyaluronic acid, which the brand says penetrates and hydrates more deeply (because of its lower molecular weight) than the former.
—Sarah Han, Allure, 23 Jan. 2025
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Sarah Han, Allure, 22 Feb. 2025
At low molecular weights, these hydrocarbons are either gases, liquids, or soft solids, much too weak to withstand the rigors of the rocket’s combustion chamber.
—IEEE Spectrum, 5 Nov. 2014
It’s also formulated with mixed molecular weight hyaluronic acid to deliver moisture deeply into the hair follicles for extra nourishment.
—Kiana Murden, Vogue, 23 Jan. 2025
This incredibly soothing gel mask subs regular ‘ol hyaluronic acid with oligo-hyaluronic acid, which the brand says penetrates and hydrates more deeply (because of its lower molecular weight) than the former.
—Sarah Han, Allure, 23 Jan. 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 13 Mar. 2025.
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