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molecule

noun

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mol·e·cule | \ ˈmä-li-ˌkyül

Definition of molecule

1 : the smallest particle of a substance that retains all the properties (see property sense 1a) of the substance and is composed of one or more atoms (see atom sense 1a) a molecule of water a molecule of oxygen

2 : a tiny bit : particle a molecule of political honesty — Time

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Examples of molecule in a Sentence

There is not a molecule of evidence to support these charges. not a molecule of sense in that girl

Recent Examples on the Web The mRNA is packaged in an oily bubble that can fuse to a cell, allowing the molecule to slip in. — New York Times, "How Taiwan Plans to Stay (Mostly) Covid-Free," 2 Jan. 2021 Other viruses, including the coronavirus, are based on a related molecule known as RNA. — Sarah Toy, WSJ, "New Covid-19 Strains: What Scientists Know About Coronavirus Variants," 1 Jan. 2021 Unlike some moisture boosters that penetrate skin, polyglutamic acid is a larger molecule that sits on top, which helps skin glow and increases luminosity (like a natural highlighter!). — Katie Berohn, Good Housekeeping, "Everything You Need to Know About Polyglutamic Acid, Your Skin's New Hero Hydrator," 29 Dec. 2020 Both vaccines are about 95 percent effective in preventing symptomatic cases of COVID-19 and use a molecule called RNA to teach the body to respond to the coronavirus. — San Diego Union-Tribune, "San Diego biotech looks to raise $150M for COVID-19 vaccine work," 10 Dec. 2020 His team has also designed a protein that can stop the virus from invading cells, but their DIY molecule is slightly more familiar. — Katherine J. Wu New York Times, Star Tribune, "Antibodies good in coronavirus fight, but are machine-made molecules better?," 27 Nov. 2020 That molecule, known as mRNA, is eventually destroyed by the body. — New York Times, "How Taiwan Plans to Stay (Mostly) Covid-Free," 2 Jan. 2021 In September, a group of researchers discovered a rare molecule, phosphine, in the clouds of Venus. — Chris Ciaccia, Fox News, "2020 in review: Top space stories of the year," 1 Jan. 2021 One of these is the receptor for an immune signaling molecule (interferons) that are induced when cells detect the presence of a virus. — John Timmer, Ars Technica, "Looking into the genetics of severe COVID-19," 17 Dec. 2020

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