mo·​lec·​u·​lar | \ mə-ˈle-kyə-lər \

Definition of molecular

1 : of, relating to, consisting of, or produced by molecules molecular oxygen
2 : of or relating to individual or small components a molecular view of the American Civil War

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Other Words from molecular

molecularly \ -​lē \ adverb

Examples of molecular in a Sentence

Recent Examples on the Web

These molecules can float away on the breeze, adding a tiny and distinctive molecular signature to the surrounding air—and that is the origin of scent. Helen Czerski, WSJ, "Wintry Scents, Indoors and Out," 20 Dec. 2018 These glasses with the Flower of Life sacred geometric designs on the bottom claim to restructure the water’s molecular shape, returning it back to its natural state, increasing the biological value, and improving flavor. Rachel Marlowe, Vogue, "How to Give the Gift of Wellness, According to Miranda Kerr," 17 Dec. 2018 Helium is, without a doubt, the Universe’s weirdest material, beating out molecular hydrogen by a rather long nose. Chris Lee, Ars Technica, "Super-solid helium state confirmed in beautiful experiment," 10 Dec. 2018 Feng Zhang, another inventor of the tool and a molecular biologist at the Broad Institute of MIT and Harvard, described the Journal’s findings surprising, noting that tests on patients hinge on rigorous trial design and follow-ups. Wenxin Fan, WSJ, "Chinese Gene-Editing Experiment Loses Track of Patients, Alarming Technology’s Inventors," 28 Dec. 2018 Cancer and aging are like opposite poles of a cellular seesaw; molecular mechanisms that protect against one tend to have the unfortunate side effect of promoting the other. Diana Gitig, Ars Technica, "Naked mole rats have a complicated relationship with cancer," 7 Feb. 2018 Such materials have molecular properties that cause them to flow like a liquid when a slow and gentle force is applied, but not when the force is strong and sudden. Roy Berendsohn, Popular Mechanics, "A Serious Ode To Silly Putty," 27 Dec. 2018 Surface tension occurs because water molecules tend to stick to each other (molecular adhesion), forming a kind of supportive film to keep very light creatures afloat. Jennifer Ouellette, Ars Technica, "Geckos’ new superpower is running on water; now we know how they do it," 6 Dec. 2018 The Crispr-Cas9 system consists of two main parts: an RNA guide, which scientists program to target specific locations on a genome, and the Cas9 protein, which acts as molecular scissors. Amy Dockser Marcus, WSJ, "Meet the Scientists Bringing Extinct Species Back From the Dead," 9 Oct. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'molecular.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of molecular

1770, in the meaning defined at sense 1

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Last Updated

30 Jan 2019

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Time Traveler for molecular

The first known use of molecular was in 1770

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More Definitions for molecular


mo·​lec·​u·​lar | \ mə-ˈle-kyə-lər \

Kids Definition of molecular

: of or relating to a molecule molecular structure


mo·​lec·​u·​lar | \ mə-ˈlek-yə-lər \

Medical Definition of molecular

1 : of, relating to, consisting of, or produced by molecules molecular oxygen
2 : relating to or emphasizing individual responses or structures of behavior proceed by more and more detailed analysis to the molecular facts of perception— G. A. Miller — compare molar entry 3 sense 2

Other Words from molecular

molecularity \ -​ˌlek-​yə-​ˈlar-​ət-​ē \ noun, plural -ties
molecularly \ mə-​ˈlek-​yə-​lər-​lē \ adverb

More from Merriam-Webster on molecular

Nglish: Translation of molecular for Spanish Speakers

Britannica English: Translation of molecular for Arabic Speakers

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